Why would you want to be in a relationship with a junkie with all the chaos, drama and heartbreak associated with it? There are plenty of nice men out there who do not use drugs, are responsible and will treat you well. Do you believe you do not deserve the best?
Don't sell yourself short, if you had a daughter or a baby sister would you tell them that a relationship with an active drug user is the best they can do?
Anyway, welcome to SR. I hope you will read other threads from members who have been in long term (and still are) with addicts so you can get a picture of things to come.
I know I sound harsh but you wrote that it is a new relationship so my suggestion would be to get out while you do not have too much vested in it.
Ps: Good call on going no contact. Stay away from him because he ll get you down before you bring him up.