I'd like to know what's going on with the house, cause I don't like how SO moves back in under the guise of wanting to be with you and then asks you to leave. Was this a convenient way to get the house for himself? I have 0 trust and respect for this guy and do not put anything beyond him.
You need to make sure to protect yourself legally from this mental case.
OK, I know you care about him. But I care about you and he makes me mad!