Here is a simple definition of "romantic love."
Using this definition, we can say that a relationship that qualifies as "romantic love" should be mutual, passionate and sexual in nature.
The Bible gives us a few examples of relationships that meet some of these criteria, but not all.
Jacob's love for Rachel burned brightly throughout their marriage. Rachel was his favorite wife. Jacob favored Rachel's children, Benjamin and Joseph. Yet there is no indication that Rachel loved Jacob with the same passion. If she did, she probably would not have allowed Jacob to marry Leah as well. And she might not have blamed Jacob for her difficulties in conceiving. It is hard to say whether their passion and emotional attachment was truly mutual.
David lusts after Bathsheba. He initiates an adulterous relationship and has Bathsheba's husband killed when she becomes pregnant. David marries Bathsheba amid a scandal. In spite of losing her first son, Bathsheba bears Solomon. She becomes David's favorite wife. Nevertheless, the relationship is founded o a power imbalance. It is not clear if Bathsheba has any feelings toward David at all. She may well have had no choice but enter into the adulterous relationship.
When shedSo in many Heb. mss; most mss. read “he.” got back to the town,
There is a degree of mutuality and tenderness in the relationship of Boaz and Ruth. They are drawn to each other because of their respective character and kindness They do eventually marry and have a son, Obed. Perhaps this is a romantic relationship. However, there is also a power dynamic here. Boaz is a close relative of Ruth's deceased husband. He is older and wealthy and ultimately Ruth needs Boaz to support her and her mother-in-law Naomi. Boaz also has a level of obligation to marry Ruth--though he could have declined to fulfill the obligation and passed it on to someone else. Would Ruth and Boza been drawn to each other if they had no connection to one another? Hard to say
So where can we find an examples of true romantic love in our tradition?
Let's look first at Shir HaShirim, the Song of Songs.
(ח) הִשְׁבַּ֥עְתִּי אֶתְכֶ֖ם בְּנ֣וֹת יְרוּשָׁלָ֑͏ִם אִֽם־תִּמְצְאוּ֙ אֶת־דּוֹדִ֔י מַה־תַּגִּ֣ידוּ ל֔וֹ שֶׁחוֹלַ֥ת אַהֲבָ֖ה אָֽנִי׃ (ט) מַה־דּוֹדֵ֣ךְ מִדּ֔וֹד הַיָּפָ֖ה בַּנָּשִׁ֑ים מַה־דּוֹדֵ֣ךְ מִדּ֔וֹד שֶׁכָּ֖כָה הִשְׁבַּעְתָּֽנוּ׃ (י) דּוֹדִ֥י צַח֙ וְאָד֔וֹם דָּג֖וּל מֵרְבָבָֽה׃ (יא) רֹאשׁ֖וֹ כֶּ֣תֶם פָּ֑ז קְוֻצּוֹתָיו֙ תַּלְתַּלִּ֔ים שְׁחֹר֖וֹת כָּעוֹרֵֽב׃ (יב) עֵינָ֕יו כְּיוֹנִ֖ים עַל־אֲפִ֣יקֵי מָ֑יִם רֹֽחֲצוֹת֙ בֶּֽחָלָ֔ב יֹשְׁב֖וֹת עַל־מִלֵּֽאת׃ (יג) לְחָיָו֙ כַּעֲרוּגַ֣ת הַבֹּ֔שֶׂם מִגְדְּל֖וֹת מֶרְקָחִ֑ים שִׂפְתוֹתָיו֙ שֽׁוֹשַׁנִּ֔ים נֹטְפ֖וֹת מ֥וֹר עֹבֵֽר׃ (יד) יָדָיו֙ גְּלִילֵ֣י זָהָ֔ב מְמֻלָּאִ֖ים בַּתַּרְשִׁ֑ישׁ מֵעָיו֙ עֶ֣שֶׁת שֵׁ֔ן מְעֻלֶּ֖פֶת סַפִּירִֽים׃ (טו) שׁוֹקָיו֙ עַמּ֣וּדֵי שֵׁ֔שׁ מְיֻסָּדִ֖ים עַל־אַדְנֵי־פָ֑ז מַרְאֵ֙הוּ֙ כַּלְּבָנ֔וֹן בָּח֖וּר כָּאֲרָזִֽים׃ (טז) חִכּוֹ֙ מַֽמְתַקִּ֔ים וְכֻלּ֖וֹ מַחֲמַדִּ֑ים זֶ֤ה דוֹדִי֙ וְזֶ֣ה רֵעִ֔י בְּנ֖וֹת יְרוּשָׁלָֽ͏ִם׃
(8) I adjure you, O maidens of Jerusalem!
If you meet my beloved, tell him this:
That I am faint with love.
(9) How is your beloved better than another,
O fairest of women?
How is your beloved better than another”
That you adjure us so?
(10) My beloved is clear-skinned and ruddy,
Preeminent among ten thousand. (11) His head is finest gold,
His locks are curled
And black as a raven. (12) His eyes are like doves
By watercourses,
Bathed in milk,
bMeaning of Heb. uncertain.Set by a brimming pool.-b (13) His cheeks are like beds of spices,
gSeptuagint vocalizes as participle, “producing.”Banks of-g perfume
His lips are like lilies;
They drip flowing myrrh. (14) His hands are rods of gold,
Studded with beryl;
His belly a tablet of ivory,
Adorned with sapphires. (15) His legs are like marble pillars
Set in sockets of fine gold.
He is majestic as Lebanon,
Stately as the cedars. (16) His mouth is delicious
And all of him is delightful.
Such is my beloved,
Such is my darling,
O maidens of Jerusalem!
(א) אָ֚נָה הָלַ֣ךְ דּוֹדֵ֔ךְ הַיָּפָ֖ה בַּנָּשִׁ֑ים אָ֚נָה פָּנָ֣ה דוֹדֵ֔ךְ וּנְבַקְשֶׁ֖נּוּ עִמָּֽךְ׃ (ב) דּוֹדִי֙ יָרַ֣ד לְגַנּ֔וֹ לַעֲרֻג֖וֹת הַבֹּ֑שֶׂם לִרְעוֹת֙ בַּגַּנִּ֔ים וְלִלְקֹ֖ט שֽׁוֹשַׁנִּֽים׃ (ג) אֲנִ֤י לְדוֹדִי֙ וְדוֹדִ֣י לִ֔י הָרֹעֶ֖ה בַּשּׁוֹשַׁנִּֽים׃ {ס} (ד) יָפָ֨ה אַ֤תְּ רַעְיָתִי֙ כְּתִרְצָ֔ה נָאוָ֖ה כִּירוּשָׁלָ֑͏ִם אֲיֻמָּ֖ה כַּנִּדְגָּלֽוֹת׃ (ה) הָסֵ֤בִּי עֵינַ֙יִךְ֙ מִנֶּגְדִּ֔י שֶׁ֥הֵ֖ם הִרְהִיבֻ֑נִי שַׂעְרֵךְ֙ כְּעֵ֣דֶר הָֽעִזִּ֔ים שֶׁגָּלְשׁ֖וּ מִן־הַגִּלְעָֽד׃ (ו) שִׁנַּ֙יִךְ֙ כְּעֵ֣דֶר הָֽרְחֵלִ֔ים שֶׁעָל֖וּ מִן־הָרַחְצָ֑ה שֶׁכֻּלָּם֙ מַתְאִימ֔וֹת וְשַׁכֻּלָ֖ה אֵ֥ין בָּהֶֽם׃ (ז) כְּפֶ֤לַח הָרִמּוֹן֙ רַקָּתֵ֔ךְ מִבַּ֖עַד לְצַמָּתֵֽךְ׃ (ח) שִׁשִּׁ֥ים הֵ֙מָּה֙ מְלָכ֔וֹת וּשְׁמֹנִ֖ים פִּֽילַגְשִׁ֑ים וַעֲלָמ֖וֹת אֵ֥ין מִסְפָּֽר׃ (ט) אַחַ֥ת הִיא֙ יוֹנָתִ֣י תַמָּתִ֔י אַחַ֥ת הִיא֙ לְאִמָּ֔הּ בָּרָ֥ה הִ֖יא לְיֽוֹלַדְתָּ֑הּ רָא֤וּהָ בָנוֹת֙ וַֽיְאַשְּׁר֔וּהָ מְלָכ֥וֹת וּפִֽילַגְשִׁ֖ים וַֽיְהַלְלֽוּהָ׃ {ס} (י) מִי־זֹ֥את הַנִּשְׁקָפָ֖ה כְּמוֹ־שָׁ֑חַר יָפָ֣ה כַלְּבָנָ֗ה בָּרָה֙ כַּֽחַמָּ֔ה אֲיֻמָּ֖ה כַּנִּדְגָּלֽוֹת׃ {ס}
(1) “Whither has your beloved gone,
O fairest of women?
Whither has your beloved turned?
Let us seek him with you.” (2) My beloved has gone down to his garden,
To the beds of spices,
To browse in the gardens
And to pick lilies. (3) I am my beloved’s
And my beloved is mine;
He browses among the lilies.
(4) You are beautiful, my darling, as Tirzah,
Comely as Jerusalem,
Awesome as bannered hosts. (5) Turn your eyes away from me,
For they overwhelm me!
Your hair is like a flock of goats
Streaming down from Gilead. (6) Your teeth are like a flock of ewes
Climbing up from the washing pool;
All of them bear twins,
And not one loses her young. (7) Your brow behind your veil
[Gleams] like a pomegranate split open. (8) There are sixty queens,
And eighty concubines,
And damsels without number. (9) Only one is my dove,
My perfect one,
The only one of her mother,
The delight of her who bore her.
Maidens see and acclaim her;
Queens and concubines, and praise her.
(10) Who is she that shines through like the dawn,
Beautiful as the moon,
Radiant as the sun
Awesome as bannered hosts?
Like the seal upon your hand.bLit. “arm.”
For love is fierce as death,
Passion is mighty as Sheol;
Its darts are darts of fire,
A blazing flame. (7) Vast floods cannot quench love,
Nor rivers drown it.
If a man offered all his wealth for love,
He would be laughed to scorn.