My boyfriend isn't too keen on me staying in England What do I do?

So a couple weeks ago I told my boyfriend that I was thinking about moving to England but she was confused and asked why. Then I said, "Well my mom lives there and she invited me." Then he said, "Well...she walked out on you guys. What makes you so sure she wants you to stay there? She only thinks of herself from what I heard." Why does everyone keep saying that. Then we got into a huge argument because he thinks I'm trying to set him up and dump him. I wasn't even. I told him we can have a long distance if I decided to stay there. He said he doesn't know about that. He said of I chose to do it and he'll get on with his life! We had another argument the day before the graduation. He took it literally. I'm in England now. He said he'll stick around with me but not forever. Everyone kept saying I'm making a huge mistake staying. My dad is against me staying here with my mom since she abandoned us but I'm 18 and can't stop me.