you are being conned. he is a master con artist.
your instincts are right on target. do not believe him. and ignore his self-pity tears. they are there for effect. they are part of the scam.
he is very dangerous to your life and your child's life. please stay away from him, and find support from other people--at al-anon meetings or from family you can trust--to gain the strength to do it. he can hypnotize you into believing him, so do please be careful. you need to connect with sane people who understand addict behavior so you are not conned. please, dear, find some support. many many good wishes for your safety and survival. sending love....