in love but always hurting

I need help, me and my boyfriend have been together for 2 years and still going... or at least trying to. Everything lately has been horrible because he thinks I cheated because I started hanging out a friend from school more and more, I now stopped talking to that person to show my boyfriend he's the only guy I care about. Not once have I had thoughts of cheating on my boyfriend and it's just not in my heart to cheat. Everything between my boyfriend and me have changed. We took a break a little before our 2 years which was pretty recently. He says we still are on a break and he acts so heartless towards me because he doesn't know to believe me or the fucked up people from school trying to take away me happiness telling him I cheated. I'm trying to keep him because I'm so in love with him. I just don't know if I should just let him go because of all the heartless emotions towards me. Please help and respond I'm completely hurt and becoming depressed.