My Boyfriends Going To Jail What Should I do ?

I'm a fourteen year old girl & im very mature for my age as compared to my seventeen year old boyfriend who happens to be notorious for his immaturity. He has watched me go through alot ( being beaten by my mother, moving in with my father, & my low self esteem he's stayed when everyone else would have left but i just don't know what to do anymore. I'm scared for us he will be gone for two years... Will things be the same when he gets out ? Will we grow apart ? I need advice.