I just have to say something to this..
Even if I don't have advice for you, I'm sorry. But I'm dealing with the exact same things you are saying...and I've put up with it for soooo long. It happened again tonight. Just flat out lying even though he must have known I knew the truth. I think it is just an ingrained habit for him...but I also think it is because he has no consience. I think the term is sociopath. Not saying you're boyfriend is the same. But even small things he lies about. I don't think people who constantly lie can change. I'm feeling like if I can't trust him, then our relationship has nothing to stand on. Do you feel like that? If you can't trust him how will anything work?