There is a general pattern in David's writing and that of his contemporary biographers - David appears to have never been all that close to any of his wives - he loves them for a while but then it wanes and he has another wife.
There is a simple evidence for this - David had so many wives - David was married to Ahinoam, Abigail, Maacha, Haggith, Abital, Michal, Eglah and Bathsheba. Each of his first six wives bore David a son, while Bathsheba bore him four sons. Altogether, scripture records that David had 19 sons by various women, and one daughter, Tamar. Further, David had ten concubines (virgins) that were in waiting for him whom Absalom defiled during his insurrection in a tent on the roof of the palace. (2 Sam 16:20-23)
I would venture to say that if David was really in love with one wife there would have been no need for any more, but that is my opinion.
By contrast - David had a life-long very close friendship with Jonathon. The friendship was amicable, tender and affectionate but most of all, enduring. It appears to have begun at the time of the Goliath incident and continued until Jonathon's death.
The Pulpit commentary has this:
Verse 26. - Thy love to me was wonderful. Never was there a purer
friendship than that of Jonathan for David. It began just after the
combat with Goliath, when the young prince, instead of seeing in David
a rival, who had equalled his own feat of valour, took him to his
heart, put upon him his own robe and armour, and thus presented him to
the army as his friend and brother. Nor did his father's hatred of
David, nor the knowledge that David was to inherit the kingdom,
interfere with his love. He remained a dutiful son to his father, and
accepted his inferior position with magnanimity, without once seeing
in David cause for blame; and it surpassed the love of women, because,
to requite their devotion, they look for protection and homage, the
more delightful because it is paid by the strong to the weak. But here
the lives of the two friends could not combine in one happy fusion of
mutual union. Their hearts were bound together, but a hard fate, of
which they were fully aware, made the ruin of the one the certain
result of the happiness of the other. Nevertheless, Jonathan, with
everything to lose, and David with everything to gain, remained true
and loyal friends.