in need of some help or advise anything honestly

So I'm thinking I might be preganant with the boy I have been with for about 3 years. I know how he feels about kids right now and I'm just so scared that if I tell him he's going to want me to get an abortion. I do not believe in abortions for my own personal reason Bec if I laid down and participated in sex I need to be ready to accept the consequences that come with it.  I don't even understand how I could be pregnant we use a condom every single time and he pulls out I guess things jut happen, but back to my point lol I feel if I tell him and he wants me to abort it and I say no this is going to ruin our relationship and I'm gonna end up alone. I just don't know what to do