I'm 14, Should I Let My BF Touch My Boobs?

I'm 14 and my BF is 14, and he wants to have sex but I tell him no. So then he says that since I'm not going to give him sex I have to let him touch my boobs. I really like him so I said ok because I didn't want him to break-up with me. So he took me in his room when his parents weren't there and locked the door. Then he told me to take off all my clothes except my bra and panties and I did it. Then he started groping my boobs in his hands for like 2 minutes. Then he kind of pushed me on his bed and started rubbing my area down there. I didn't like it and kind of groaned but he kept doing it. Finally he stopped and just said same time tomorrow. I kind of just nodded and got dressed and walked out. He's done that to me 3 times since then and he told me tomorrow that I should masturbate him with my hands. I don't want to and I'm scared. What do I do?