Has my marriage lost the potential to work?

I am 22 years old and have been married 6 years November 10th. I am a soldier for the U.S. Army and am seriously rethinking some things. I have two children a daughter who will be 5 december and a 2 year old boy. I am not cheating on my husband in anyway. I have told my husband the times when I have felt the temptation to go outside the box so to speak but have never done it. I tell him so he knows something is wrong in our relationship that is causing me to feel this way. I feel that my husband is full of empty promises. He promises things we or he will do but it never happens. I don't want to push or nag, but I feel if he helped me out more at home and was a more gentler of a father to the kids and wasn't so attention seeking, and sensitive I could see some potential to this marriage lasting like I want it to. My friend says she sees me walking away very soon if he doesn't wake up. It is like he thinks I am not playing and am too scared to leave regardless of the situation. Being that I am in the military with two children, how would a divorce affect me financially and how would it affect my carreer? He says if we split up we would still be friends and he would take care of the kids while I deployed, but would I be able to support the kids financially with the allotments going to him? My income is pretty much the only income right now. He is going to school for cosmetology and is claiming unemployment from his previous job in the meantime. I want to do the right thing, financially and for my family, but I need to be happy too. Any ideas? I don't want to end it, but I am too busy to wait around for him to get his life together. Like I said I am 22 and he is 33...I expect more from him at his age. I feel more grown up than he is. He even makes no secret when I do things he dissapproves of like I need his permission...I end up feeling major resentment and disgust when I think of some things in our relationship....also like I said, I am the soldier. I am the one in the army. I understand that he wanted to be in the army, but he doesn't need to act like he knows more about my job than I do...he does that all the time. He also doesn't need to talk to the kids like he is a drill sergeant or put my daughter in the position of attention to get her to listen.