Coping with a (maybe) lost friend

One day, me and my friend, who is a girl, saw each other on the bus to high school on the first day of school. I talked to her and she has really matured from when I first met her 2 years ago. And now, I have made a new friend, a guy who has the same interests as me. He liked the girl who is my friend previously stated. After a week, I invited them over and the guy friend did not get his chance to talk to the girl who is my friend. After another week, the girl friend did not like the guy friend and the guy friend sort of hates me right now. It seems as though in trying to set these two friends together, I might have to break through barriers between the two. Oh, well. I can't change lives. Or can I...?