hey, firstly dont feel ashamed that you fell pregnant quick, ive been with my man 2 and a half years too and fell pregnant quick as well
but to answer your question should you stay or should you go, i think you pretty much answered your own question when you said that your starting to resent him. if this was me in your situation i would break up with him but be amazing parents separately. i think i would have to get out of there before i started to hate him.
im not really good with advice, but i hope you are happy with whatever you decide.x