so i'm in a happy relationship that's going well. however, my friend likes me and i feel bad for him because i will never be with him because i know me and my boyfriend will be together for a long time. he told me that he likes me, and i told him that i couldn't be with him because i'm in a relationship. is there anything i can do to make him move on, but still remain friends?
You really cannot make him move on. He has to choose that himself. Give it time.
Try to fix him up with one of your friends--when he finds someone else, his crush on you will go away.