ok well if you realy like this guy and really dont want to break up with him, then talk to him about it, honestly its the best idea, it will work, that might result in breaking up but yet again it may not.
if you are finding this a horrible relationship, hurting you, not fun, painful etc then you should split up with him beacuse whats the point of staying with him if your not having an fun ey?
he might get anoyed etc but at least you no its the best thing to do for you, just tlak to him about it gently, write him a letter mayb? hope this helps xx