<human>: Can you condense the text into a few key points?

So I'm guessing this is probably a question that has been asked before ofcourse, but the situation is a little different here. So about 5 years ago me and my best friend fell for the same girl. He got her, they've been together for 4 years and its been a tough long road. This isn't the situation where you can just tell me to stop hanging out with them or anything, we have the same friend-core so thats pretty much impossible. I've tried avoiding them before, I ended having to avoid all my friends, which is something I definitely don't want to do. Honestly, I've come to terms with the fact he's with her, but it's like a corroded knife is being dragged across my chest every time I'm out with them.

I thought time would help me get over it, it hasn't.

Help.
<bot>: Best friend and I got fell for same girl, he got her and now I need help getting over her after 4 years of trying, can't avoid them because we have same friend-core.