I don't think you're weak I think you're strong. Either he has a mental illness, which imo should really be addressed this looks severe, or he is conning you. Which is not your fault. In either situation it is not your fault for being sincere. He's hurting you now more than helping. He changed into someone else or was never honest in the first place. Somewhat similar thing happened to me too. Personality change caught me off guard. All you can do now is protect yourself. If he doesn't leave in June gotta boot him. If he gets abusive time to call police. It's you saving you at this point.