Yeah, I'm gonna have to disagree with this. Bowser downright loves being an evil jackass, and while I do agree he has a genuine crush on Peach, there's no hell of a way he'll give up his evil ways for true love. As soon as he captures Peach and gets rid of Mario, he'll mostly likely take over her kingdom and start an awful tyranny while keeping Peach in the side as a trophy.

Besides, Bowser himself implied one of the reason he kidnaps Peach and tries to woo her is because he needs a "mother" for his children, whether Peach likes it or not.

Also, it's pretty clear Mario and Peach are good friends at the very least, it's just subtle because, lol Nintendo, gotta keep the main character a blank slate for gameplay reasons or whatnot. But they do have their moments, like Peach visiting his house, sending him invitations and letters, watching fireworks together, and so one and so forth. There's a major difference of status between a regular plumber and a princess who runs a kingdom, it wouldn't be quite chivalrous for him to seek her out like she does with him. But hey, Peach going through that trouble and her advisors allowing it says something right.

But anyways that's just me.