It's hard to say. Ask him, straight forward. There are so many elements to a relationship. More than one need that needs met. When one person won't compromise with the other it causes problems. You can't make someone change, they will only change if they want to. You need to discuss the issue with him, tell him it's pushing you away and for a marriage to work and be what you want it to be, both people need to contribute financially and you cannot and do not want to do it all alone.
After talking about it with him and laying it all out, giving him time to make a change, if he doesn't then you have to decide if this is okay, if you can accept this or maybe it's time to move on.
I was in a 4yr relationship and I started having those feelings, but mine was more do to the sexual aspect of the relationship, not sticking up for me, being sloppy among others. I wanted out but I was scared to be alone and that is what it came down to. I advise to anyone NEVER to stay out of fear of being alone (not saying that is your reason).

Basically, talk to him. We can all guess why he isn't but only you and him really know because no one here knows your whole relationship. My first thought is (basing off of what happened to a friend) he isn't getting a job because he doesn't want to work and why should he if you're going to let him mooch off of you? If he doesn't have a disability or something then there is no reason he can't get a job and help you out.