Am I nagging too much, or are these reasonable things to complain about?

I'm in a long distance relationship with my fiance. We have dated for 2 1/2 years and were best friends before we started dating. Recently he says that I've been nagging too much, here are the things I recall talking about: It drives me crazy that he has to always be doing something when we talk, whether its playing a video game, or music, or solitary he is always doing something and I feel like he isn't paying attention to me. He says he doesn't like to talk but in a l.d.r. that's pretty much all we can do. Second, I kinda complain about him mom because in my opinion she uses him and she doesn't seem to like me much, I think the mom think is the usual inlaw type situation, I also complain about him not being very romantic, something I think alot of girls probablly think but don't necessarily say, and finally I complain about him always bugging me about doing y things for him, I don't always have a problem with it but it kinda gets annoying if its all the time. I don't think any of these are a big deal really but I do seem to get on him alot about them and I think our relationship is hurting. Recently he said we should take a break but we didn't, we are one of those couples that fights alot but always makes up. I love him very much and I know he loves me too. I know that he does alot for me and I know that I've been somewhat unappreciative so I want to stop nagging him so much, however sometimes I feel like he's a bit verbally abusive, he kinda puts me down sometimes. So that is why I'm confused. The truth is we love each other very much but I don't necessarily think we are the most compatable people in the world. We just can't break it off because we do love each other so much and it kills us. So I don't necessarily think that is the solution. I want us to work out and I know he does. So I mean does anyone have any advice to help me out with the nagging and perhaps a way for us to work things out better. We are both stubborn and thats why we always buck heads. I want to marry him though and I know he wants the same thing so I really need some help to prevent some fighting. There is alot more I guess I have been super sheltered and want freedom but don't want to give him up and its really a hard and complex situation because he's in the military and our time together is so limited. But he's been in for a year and already went through a deployment, we've made it through so many fights and hard times that I know we can make it through anything. We are both very stubborn in our persistance as well. Please help me out I really want to show him that I am trying to make things better for us.