How to get rid of feelings for someone and accept being their friend?

I'm a 14 (almost 15) year old boy, I've never had a girlfriend before and hadn't ever even had feelings for someone until recently. The problem: it's my friends girl. I myself want she and my friend to be happy together and am happy with just being her friend but holy moly I'm like really attracted to her on like a subconscious level and don't know how to get rid of these feelings.