It seems like you're starting to develop an unattraction to your boyfriend. The long list of annoyances that you outlined in your letter -- the dirt bike, the possessiveness, the lack of communication -- sounds to me like symptoms of an impending breakup. I think you need to ask yourself why you want to be with him. Is it because of the person he is or because this way you can say you're with someone?

Once you figure out why you're still with him, or maybe why you shouldn't be with him, things should get clearer. It sort of sounds like you don't like him very much, and in turn he's not a very good friend to you. It also sounds like you have really different ideas of what a relationship should be. Sometimes that difference in ideals can have a lot of ramifications on the rest of a relationship.

As for the being friends later on part: that might be a bit trickier. From what you say in your letter, it sounds like the two of you might have completely different ideas of what you want from someone you're dating. Feeling tied down and restless are both possible signs of trouble. It might be best to give this situation time; if you do break up with him, he'll probably be very hurt, and everything about your relationship will change. But it's possible to mend fences between people; it just takes time, and understanding.