Does this mean he's cheating?

[his mrsssss.]

I've been with my boyfriend for about two years now. I am so emotionally and physically attached to him and his family, they all welcomed me in with open arms and treat me wonderfully. I just recently turned 18, I'm working and also writing my first novel which is set to debut this winter. I'm always going back to school to get my diploma, I dropped out my senior year due to several things that I would rather not get into.

However recently, I've been very busy going out of town, working and just trying to handle business. My boyfriend always says how I never show him attention and that I make up excuses and that I'm a liar when I say that I'm working. But I've taken off days just to see him and stay with him.

He constantly accuses me of cheating and seeing other guys because guys write on my wall on Facebook saying that I'm beautiful, I'm this and I'm that and how I need to inbox them but I never do.

He says how I'm always on my phone, but mind you I work on my book through my phone which he fails to realize. I have a few guy friends but when they text me or call me it's simply to ask how I'm doing and that's that but they do know that I'm in a relationship and they respect that. So he gets mad. Yet, girls are always on his wall and in his inbox. I gave him my password to fb and twitter and he claims that he didn't log on to neither which I don't believe. He's just always on to me and speculating, I've never cheated on him and I really love him. Can this be a guilty conscience of his? He told me that he was insecure as well.