I know in your OP you mentioned that your family keeps an eye on you because of previous crisis' and that you are afraid of his not being there for that reason. I truly believe his presence will make you feel worse instead of better. He doesn't sound like the type of guy that's bringing validation of your self worth to the table.

I do not believe your resentment that seaps out as anger and frustration about finding some type of employment and contributing something to the household expenses Causes his lying ways. With all the whining he does to his mommy and her actually buying it hook line and sinker I'm not sure that he has Your Best Interests at heart.