Oh Blue...it sounds like you've been throught the ringer. ********Big Hugs*********
As an unbiased observer, it's all gone by very quickly. The honeymoon period is almost over and now you are into the fundementals of dealing with the relationship itself...warts and all.
This all seems to have run gung-ho on you and this chap. The beginings of a relationship are full of over enthusiasim and romantic ideals....6 months later you wake up to dirty underwear and bad habits. Ok slight exageration but I'm sure you can follow my thought 
Can you answer me a few things:
What does a commited relationship mean to you?
What is the difference between a commited relationship and a marrage?
If either of you came seriously unstuck in life would you stay together? What would that be like? (unemplyed, pregnant, seriously sick etc etc)
At what point is a realtionship worth leaving...what is acceptable and what is unacceptable. In what way does he come close to these boundtries?
In what way would he answer these questions...where would the diffences lie?
Now all of these are retorical questions...I don't expect answers but they may help you formulate your own rational thoughts regaring the viability of the relationship post the intial romantic hit.
Now sure if this is helping or hindering you....just trying to let you look at your own realtionship.
Love and hugs
Lis