Should I worry?! Why?!?

Well my bestfriend (a guy) is now dating my other bestfriend (a girl) & she knew I was in loveee with him. Me and him used to talk everyday and hang out a lot but now we never talk and never hang out. Is it because of her? I don't know!! But now that they're going out what little one we do talk is boring like a simple hey what's up and gtg. I'm worried I've been pushed it of his life becaus of her!