Just a rant, no need to read on unless you're that bored...

This guy that I have hardcore feelings for, and who I have also been hooking up with, has recently started following and liking one of my good friends Instagram posts. He has no romantic feelings toward me, and he made that very clear, but it's ripping me to shreds having seen this chick just leave a 5 year relationship, and I know she's rebounding hard. I don't want either of them to get hurt but I don't want to get in the middle of it. This guy is literally my best friend apart from the stupid feelings I have for him, and I wouldn't be able to stand seeing them two together if it ends up that way. I would never be able to look at him the same or talk to him the same way I do now knowing he's with another one of my good friends. I know they wouldn't be good for each other, but I'm not sure they'd realize that at first. I want to tell him, but I don't want him to think I'm some crazy bitch who is just trying to dictate his life. I just feel really sick right now