Complicated

I have fallen in love with my friend's girlfriend of almost 3 years; she is also one of my best friends. I am not asking for advice on whether to pursue it or not because obviously that's not happening; I'm not risking ruining the relationship of two of my best friends for my own needs. What I'm asking for help on is that- for my own feelings- whether I should completely distance myself from her and try to fall out of love with her or just endure the fact it'll never happen so I can keep her as one of my closest friends. If I do the first I think it would be healthier for me so I can get over it but I would like a third party's insight. Thank you