Help! :(

My boyfriend recently pressured me into having sex. I really didn’t want to but he kept being mean and saying things like if I loved him I would do it or how I never do anything for him. He made me feel really bad about myself. I told him no after three times he told me yes so I just shut up and let him do what he wanted to. I just feel like this is all my fault. I could’ve stopped it but I didn’t. I just feel so guilty but it makes me sad I felt obligated to have sex with him. He broke up with me and I just feel so worthless. We dated for years+ btw. People I reached out to say this is rape but I don’t think it is. I feel like if I tried to do something about this like press charges people will think I’m stupid and say I could’ve stopped it. I’m only 15.