Base on what you have said. this is just how i feel. you are telling him what you need for this relationship to work. but he is not planning to stable down, and choose to run away from problems in this relationship. and i also find that you did not mention why is he so afraid of introducing you to his friends. i feel that there is alot of things he does not want to tell you, or simply just want to escape this issue.

i feel that a relationship required both of you to share out how each other feel. it doesn’t matter how many common interest you both have or fun time you two have been together. because everything has an end to it. try to find out how he feel with your common friends if he does not want to tell you directly. Or talk to him when u feel his mood is good. Just remember that you need to listen to how he really feel and not telling him how much you have did for him or want him to do.

if it still don’t work, tell yourself you have done your best to work things out. love yourself more, spend more time understanding yourself. life is full of changes, choose to live happily. best wishes.