Relationship scenario... :)?

I'm trying to write a romance novel. Here's the story:

Boy dates girl for about a year, and it was a good relationship. Girl breaks up with boy because she couldn't handle a boyfriend (life was pretty rough, but relationship was fine) but they were both nice about it.

They remained friends; its clear they're still attracted to one another.

Girl regrets it several months later. She asks boy to get together again. He says no.

A few months later, boy asks girl to get back together; she's in a relationship, and says no. Boy doesn't really mean any harm, but just wanted to say his feelings.

A few years later, its clear that they're both attracted to each other; they have remained good friends, and had other boyfriends/girlfriends, but are now both single again. Who asks the other person if they want to give it another shot? Should the boy ask? Or is it the "girl's turn?"

I'm trying to make it somewhat convincing :) Please be nice!