My best friend had sex with the girl I like. I'm not mad at him, because of multiple reasons. I stated that I liked her but wasn't so sure (the first time I felt something like that), she already stated she was more of a "free" girl (Wich I totally respect, she has the right to live her life however she wants) and she did it because it was his birthday. When he told me, he didn't realize how I felt because we were on a discord call. I excused myself for a second, told him I was making some tea. I just started walking around, shaking and u able to control my breath. None of them did something wrong, but I still felt weird. I'm not in a relationship with her, I'm not sure she likes me like that, and I already knew how she was. But still. I came back after 5 minutes and just played some games with him like nothing ever happened. I feel like shit, and I don't think I'm even justified to feel like that.