What to do if your boyfriend tells you to move out of the house you share every time you argue then says hes doesnts mean it?

This is a form of emotional abuse and shows his maturity level. If when you argue you cant do so in a manner that is condusive to solving the issue then you may need to reconsider your relationship. Why should he be telling you to leave if you disagree on something. You should agree to disagree, you are, after all, two different people and are entitled to your opinions. Compromising is a big part of any successful relationship, work on that together or both of you may have to find other living arrangements.