Welcome around. As everyone said read all you can you'll find great help here.
I was in the same sitiuation until yesterday. We've been together for 3 years and despite the fact that i thought alot about breaking up with him i was never able to really do it. It's the hardest decision to make but being with an addict forces you into a circle that never stops until something happens to stop it.just like they have to hit bottom to recover and stop using we also-people who are in love with addicts- have to hit bottom for us to be away from them. my bottom was yesterday when he beat me so hard.
My advice to you dont waste your time and feelings on someone who is not willing to change. the addict is a person who easily hurt himself ,destroying it on purpose dont think he'de care for you,he doesnt even care for himself.