There is a saying that when someone tells you about themselves, believe them. He has "shown" you who he is, an active addict who misrepresents himself in order to attract people.
He brings nothing honest and trusting to this relationship, to remain with him is to invite more hurt and deception.
I am sorry for you pain and glad you found us. I hope you take a good read around here and see what your life will become if you remain with an active addict.
Hugs