How to get over someone i never had

r/

So, i am a guy (16) i never have been in a romantic relationship before and i met a girl last year (she’s 15) and she has been in 2 relationships before. We started talking because of our mutual friend and i fell for her, the way she faces her problems and her akward jokes made me fall in love for the first time, people started believing we were dating and started believing that too, we didn’t talk about the rumours but we kept talking everyday for 5 months, i told her everything about my life and she did the same.

After some time i asked our mutual friend if she ever talk about me when they are alone and he said she didn’t, he started giving me tips on how to propose a relationship to her, and so i did but i asked if “are you in love with me?” I did not said i was in love with her, she said she saw as her bestfriend. We still talk almost everyday but now our mutual friend said to her that he loves her, and she sees him a friend too. I can’t help but to think that i blew my chance away, are there any tips for me to forget my love and start see her as a friend?

“TL;DR” i feel for a girl and she saw me as a friend, how do i get over her