Should I have the baby or not???

My name is Sa'mya im 15 almost 16 years old and im pregnant. My boyfriend is 19 years old and we live together, and he said that he wants me to have his baby but im having second thoughts about it. I am 1 mth pregnant and I dont think I should have this baby. But if I tell my boyfriend that I dont wanna have it he's going to get mad at me. I was pregnant before this but I lost it and he wanted to try for another one, and everytime we would have he would ask me do I want to have his baby, and I would say yes. He made me go to the doctor one day because he said that he had a feeling that I was pregnant and the doctor came back in the room and said I was pregnant my boyfriend was happy but I started crying and he kept giving me hugs n sayin when the baby get here we're gonna be fine. Im scared to tell him that I dont want this baby because I know he gonna get mad and wanna fight me.