Making a hard decision

ah well in my opinion, if you care for him, then you do and you shouldn't leave him. but I think you seriously need to think about this. Because if you don't really really care for him, and you aren't very happy, then you should seek someone that does make you happy. It sounds to me like you are just a bit bored though, and in that case I would suggest that even though you don't want to, you might want to chat with your significant other. Only through communication can relationships improve.

Sean is right I think, its better to tell him whats wrong early before its too late