I honestly don't understand

My parents are worried about the relationship I'm in because I'm "isolating [my]self from friends and family," but when I make an attempt to hold a conversation, there is no response. Apparently my mom had surgery recently...they decided not to tell me until after the fact, and I still don't know what the surgery was for. I myspace messaged my brother, because I miss him and wanted to talk, but he read it and didn't respond (I only know that because myspace indicates the action taken on messages.)

There is nothing wrong with my relationship with Wesley. We are in love, are extremely happy together, and he only wants the best for me. I talk to my dad and my aunt. If anyone is isolating themselves, it's my mom and stepdad. They make no attempt at a relationship, and if they would listen to me and give me a chance to explain some things, I would be much more willing to talk to them. As it is, every time I have talked to my mom, she ends up hanging up on me. My personal favorite is when she gives me a laundry list of problems, but I'm not allowed to respond, because she doesn't want to play the "back and forth game." I don't want to play that game. I just want a chance to defend myself against some glaring mistakes in logic. (Wesley got in a fight with his sister, ergo, he will start hitting me. By that logic, my brother will be an abusive partner too).

It's not that I don't want a relationship with my family. I just don't think I have any reason to put up with this, and I really don't think they have any right to treat me the way they have.