Should I stay or go? Am I making the right decision to marry?

These are just a few of the questions that are continuously running through my head. I have been engaged for about 6month and the wedding is coming up faster...and Im nervous and questioning my future with this man. My fiance is a great man, best friend, trustworthy, and loves me to death. I think we got together because it was easy. We were comfortable with each other. I don't know if there was ever any lust for each other (at least on my end). I am always asking him to help me with stuff around the house since I work full time and go to night school and he just would rather sit on the couch or do something other than lend me a hand. I also worry about our income. He and I together make an ok income but I am working to move up the ladder at work and he doesnt seem to care if he moves up or not. He feels that he can just wait until on opportunity comes to him. We have so much $ going out of our checking for his bills and rent that we cant even save for a down payment for a home. Im feeling resentfull of his laziness and struggling with the lack of ambition and drive for a better life for us both. So now here I am...wondering...can these issues be worked on or is this going to be my life...no pion, resentful that we cant live comfortably, and feeling like I have a child for a partern? We have talked about all these issues numerous times and no changes just excuses. I do love him but I really am confused...Any suggestions?