<human>: Basically  I [21 M] have been friends with this girl [20 F] since high school, going into last year of uni now. Over the years it's gone from not having feelings, to having a crush (I always thought she was attractive), and then as we became pretty much best friends and especially over the past year I've pretty much fallen in love with her to the point that I think about her all the time.

There were always random hookups over the years with other people and what not for both of us, but I always got over it somehow whenever she did, mainly because it wasn't actually a thing. But over the past couple weeks there has been a guy she likes and has started kinda seeing, and it's starting to ruin me. I can't stop thinking about them together, and when I'm with her and see her texting him I get depressed. Just the feeling in general that she likes someone that much and it's not me is killing me

But even with this, I still do care about her so much and love her as a person. I have tons of fun with her otherwise and she's always the person I've gone to with problems and what not, and I'm going through some stuff right now which is making this even harder since when I go to her now I just keep thinking about her and that guy. I guess I always knew this time would come, but I don't know what to do now that it has.

So basically, is there any way or methods people have used to get over someone like this, but still stay as best friends? Or is it just impossible without me being constantly depressed and cutting communication or distancing myself is the only way?

Summarize the given text in a few sentences.
<bot>: In love with best friend. She's starting to see another guy. Is there any way possible to get over her and stay best friends?