My crush is not really like what I thought?

He's very sweet, charming, innocent and probably the nicest and caring friend I ever met. We've had a lot of sweet memories together and I thought he's giving signs that he likes me too. I know he always acts promiscuously but I don't know he's really promiscuous. Today, my friends were talking during recess about him. They said he stole their girlfriends. I was kinda surprised and it somehow hurt my feeling. They planned to bust him tomorrow because they somehow knew he would be dating with one of their girlfriends. When I got back to cl, I felt so disgusted with him, I felt everything he said was a lie. So when I was packing my bag, I saw his bag on my table, so I knew he was waiting for me but I went home without saying goodbye to him. I know I must move on but I just can't help myself from feeling upset and kinda jealous. What should I do?