im conflicted on what to do

im 18 years old and i’m pregnant, i took 4 test and all of them were positive. i told my boyfriend (he’s 20) and he doesn’t want it. yes ik i’m very young and this is a life changing thing. i knew this would happen he cums?( i’m not sure if that’s the correct term) in me literally every time we have sex. he started doing this in early may a few days after i finished my period. but we knew this would happen and he wants an abortion and i’m not sure if i want to get one but he is pushing me to get one, not really giving me a choice. i literally cried to him about it and he still wants me to get one. i told him he didn’t have to be there or be part of the child’s life but he doesn’t care. i don’t know what to do at the moment, i know this is life changing, but i know i wouldn’t be able to go through it. i’m pro choice but now that it happened to me i don’t want to get rid of it. any advice ?