I'm not going to be a supportive wife
Why wouldn't you be a supportive wife?
Because my husband is not supportive either.
I think both of you are in the wrong here.  Married people should support eachother!  Otherwise, why get married in the first place?
This relationship isn't what I expected but I don't know if I can break it off.
Well maybe if you both started supporting each other a little more then you'd feel better about your marriage.