Unhappy?

I feel unhappy most of the time in my new relationship. It mostly sucks because I was so unsure if I wanted to be with him or not in the beginning. He used to want to be with me so bad. He had no place to live and no family to turn to, to help him. so for a while he lived in my grandmothers room in my moms place...right around a month before she was coming back from vacation we started dating and when he had to leave my moms. I took him in. This relationship has been so trying and hard. He lost his job because he decided to be an idiot and steal. He’s been out a job for months and I deal with his attitude so often it’s wearing me out and showing me parts of him that I can not fix. Not even begin too. On top of all that he’s 22y/o with erectile dysfunction and a bad weed smoking habit. I’m definitely stressed out. Help me. I need a friend