Please help me before I ruin my relationship.

I have a great boyfriend I am very much in love with. We had a wonderful first year of dating and frequently speak of getting married. As time has gone on though, things have gotten worse. I had a falling out with my group of friends and have become very withdrawn since then. I'm kind of a loner. My boyfriend is the only person besides family I still have (I'm 24.)

Recently he has been spending lots of time with another guy friend who he plays tennis with. They now play tennis about 4 times a week and when I don't see him because he is doing this, I get very upset. I "broke up" with him after he chose to go to his match over talking about issues in our relationship. He seems to want to please everyone else in the world (not canceling the match) over talking about our issues.

He says I comtrol him and who he talks to. I do monitor what girls he talks to and look in his phone. However, this is all after I found out that he was texting another girl behind my back, when I told him for 7 months that she made me uncomfortable and to stop. He swore she was just a friend although she frequently called and made contact. That was a year ago and he thinks I should "get over it." But now I feel like I have to watch what he is doing. I even have to watch when he hangs out with his friends because they are very much into cocaine, strip clubs, and even inviting strippers/prostitutes to their apartments! While I don't think he would ever be involved with that, I still get very angry when he hangs out with friends.

He says I keep him on a leash and get mad about everything he does. I know I over react but how do I trust him? He's lied to me about other things than just the girl he was texting, but nothing else that big.

How do I learn to not control him? Does this possession have to do with me having depression and no one else friends wise ? I have acted this way in past relationships though when I had all my friends still.

How do I not be a controlling girlfriend??? Thanks in advance.