I am writing a fantasy novel (potentially series) where the main character is a teenage girl (Spoiler: I am not, nor have I ever been, a teenage girl) and much of her interaction is with other teenagers, so I wanted to of course have some romance thrown in there with her getting a boyfriend and all, but I wanted to kinda mix it up where the first guy she ends up with she also ends up breaking up with, maybe even have this happen twice, before she finally ends on the actual pairing. However I don't want to rely on the common trope of turning every ex into this monster of a bad person that the audience is supposed to hate, I want it to be a little more sublime, like it just didn't work out, they weren't really compatible, etc. etc.
Trouble is, I have no idea how to write that, it's hard enough getting the rest of the perspective right for my MC but almost all point of reference material I find trying to get ideas uses the "my ex was an A*hole" excuse, and I have little personal experience to draw on because I literally married the first woman I dated so I'm at a bit of a loss for how these kind of amicable break-ups happen, like what makes someone end a relationship on good terms and still communicate?
I know this seems so basic a question but it's an aspect that I see so seldom explored in media that I honestly have no idea how to picture it or give it just dues, so any advice, suggestions, tips, ideas of other books, moves, etc. to check out and all that?
Source: reddit post