Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh.

In short, you have two options it seems since he is not willing to change. No doubt you have the right for a house with him on your own, I am not sure if a local Imam can talk to him about your rights including a separate residence that might ease the tension with his mom.

Back to the two options; either be ready for divorce or take it responsibly if it happens. Life does not end by divorce even if it hurts and it causes a real hardship but we must always pull out and seek positively new ways to live honorable.

Or, try to change things on your side to accommodate the status you are in now. You dated him for 7 years you said, you knew him and his mom, your parents knew it too so I would assume since you knew you might be able to cope.

My advice is the second option of course, try to rise over the issues that bother you and try to convince your husband to move in the near future to a place on your own. I pray and hope things will work for both of you insha’ Allah.