I don't want to believe it..but I think that my boyfriend who is 24 just got a 15 year old pregnant.....

I am 24 and my boyfriend is 24. My 15 year old cousin was staying with us because of issues with my cousin going back and forth from her mom to dad's house. So as of about 6 months ago she has lived with us. She says she got pregnant with my boyfriend. She says she pushed him away but that he was so big that he hurt her and that she bled alot afterwards..and she says that he didn't wear a condom. She got pregnant with my boyfriends baby and now she is telling a lot of people and I just want to die. I don't want to believe it but I just got out of the hospital after passing out and throwing up all over the place. I haven't told anybody else except one of my best friends. I really want to just die. I am shaking so much and the thoughts that I am imagining do not feel right but I don't wanna believe that my boyfriend did it. But she said it happened in my bed and that she can prove it that he did it. She is saying they were making out and they went too far. I don't want to believe it. But it is hard not to know because she is pregnant.