I can’t forgive my friend

My story as old as time. Probably you have had the same experience and would be able to help me somehow. The point is that I can’t forgive my friend. Okay, it happened over 5 years ago. I introduced my friend John to my close friends. Everything was just okay. I wanted John to befriend with my friends. But sometime later I have noticed that John sort of replaced me. He started to hang out with my close friends without me. Could you imagine it? And when I told him that I wasn’t okay with it he just laughed at my words and was kind of surprised. Well, it drove me crazy and frankly speaking it still drives me crazy. It offended me so much.