Ppl definitely get to choose who they love. Atleast their personality and appearance. You just needs to have a bit of self respect not to overcompensate.
You can choose who to try to love but emotions are not that simple. If you can just
get over it I'd argue it was too shallow of a feeling to be called love.
Maybe you are blessed with excellent control over your own feelings but I feel like you'd be in the extreme minority.
Personally I fell in love with my best friend and the feeling was so paradoxical I never got over it. I wanted the best for them but I selfishly wanted them to myself. I hated them for moving away and dying alone but I miss them so terribly I'd do anything to see them again. Five years of yearning for them to be alive again and seven years before that of wishing we could be together.
I myself might be on the other extreme from you but it's sure as hell not something I can just get over. I believe the MC is the same but maybe enjoying life with another person would work better for her than it did for me.