Help ladies, gents, whoever can!!?

I'm pregnant but my uncle lives with me in my apartment. He's in his late 40's but sometimes when I wake up, i find him in bed with me. I'm too scared to tell anyone. He likes touching me in places and has asked me to strip many times. He kisses me and has had with me 3 times! I'm scared of him so I do what he says. I'm afraid if my boy friend, who im pregnant with, finds out, he'll bail on me and my baby. WHAT DO I DO??