[Well, look. To be fair to Momo, Jiro's never actually gotten a taste of what romance is like in any form - the closest she's ever gotten would probably be Kirishima trying to get it through her head that helping someone no matter the issue is heroic, considering how gentle he was about it.
In comparison to everything she's done before today, though?
Her best friend getting so emotional over a birthday gift as to pin her to a wall, getting bodily lifted and carried to bed where they spill all their feelings for each other, only to be told that being herself is what makes her attractive while getting covered in soft, gentle kisses?
That's pretty romantic. At least, Jiro would say so.

All those little kisses are starting to get her skin to grow warm and prickle too - and she can tell she can't stay pressed close like this if she wants more from her, either...
So she ends up pulling back a bit, leaning back and moving her hands to Momo's shoulders. Still trying to keep close, but not too close.]

Why wouldn't I...? You're just as amazing yourself, Yaomomo.
I've always thought that.

[It takes her a second, deciding if it'd be a little too mushy for her or not, but she moves one of those hands up to gently card through the hair spilling out of Momo's ponytail.]

... No idea if you really want me to wax poetic about it, though. I'm not as good with words as you are, anyhow.