Go back and read some of the scenes again. She makes no real effort to even really understand where he was coming from (in spite of the fact that
she has literally experienced the same thing before), and after their initial argument
neither one of them make an effort to even attempt to talk to each other. She explicitly tells you in the one scene that she's been abandoned multiple times in her life, so her default response to rejection is to run away - in essence, to reject the person back as a defense mechanism against being hurt. MC berates himself for never trying to contact her, but she did
the exact same thing. She repeatedly mentions how she needs you to be there for her (and you promise you always will be because you're stupid teenagers and teenagers make grand gestures), but the FIRST TIME you have anything resembling a fight, she bails and never looks back. She makes no effort to understand you, reach out to you, or otherwise bridge the gap.
She isn't in love with you. She's in love with the
idea of love. She has idealized your relationship into a perfect dream, and the moment that's called into question, she runs like hell. Your relationship wasn't love, it was two narcissists fucking (
so their gay friend could live vicariously through them).
And all of that's
before you get into questions like just how much she knew about your mother (she was acting incredibly shady at the dinner before your mother disappears), which would actually make her complicit in the problem and would justify your own response even more. Not to mention that the scene with her foster family comes across as a textbook example of a lot of her issues (
which I've discussed in this topic before).
And the rest still stands. If you see their "happy" moments in the flashbacks, you realize their relationship was incredibly shallow. They have almost nothing in common apart from sex, and they barely relate to each other at all. It's very apparent that she was essentially latching on to you in exactly the same way most of the current love interests are - as a means of "fixing" her own problems. She even admits at one point that she basically wanted one person in her life who wouldn't leave her or want something from her. It's what made their break up so easy - they were barely a couple in the first place.
The fact that we're presented with MC's viewpoint from the start - where he is vastly over-romanticizing their relationship in the wake of its ending - can give you the wrong impression of what it actually
was. But it's pretty obvious it was never really how he portrays it (which just makes him feel like even more of an overdramatic narcissistic crybaby himself for being so utterly broken up over it). It was a teen crush (and lots of sex), not a grand romances of the ages. Both of them would be way better off just getting over it and moving on.
Or to quote myself from another previous post I made:
