My boyfriend's unusual behavior...?

My boyfriend has been acting strange in the last couple of months. For a couple of years the has been super amazing, hands down. Now he refuses to make love to me, but, demands that I suck his . Then, he'll accuse me of not "putting out" and threatens to cheat on me. However, I'm constantly offering him my love. He doesn't let me out of his sight, but, hollers "I need space". Always taking me with him where ever he goes. I've become his shadow, now. He wants me to get a job, but, when I do get one, he wants more space and starts seeing other women, then accuses me of cheating, when I haven't. It just doesn't make sense. He tells me he loves me, but, saying and acting are two different things. He definitely shows when we make love, but, doesn't when we are platonic. He always call me a "Stupid B**ch" when I talk about something intelligent. He's addicted . Also, when I simply speak he tells me to shut up. I am a very quiet gal. Why is this?