Only he can save himself, you can pray and miracles do happen. I have been where you are. My now Ex was in the bishopbric, stake presidency, and was the Stake Mission Pres when he left me for a co worker. You need to prepare for the worst and protect yourself and children. You are with an emotionally retarded man at his time, meds may not neccessarily help either.
Pray, go to the temple and receive your own revelation. However in no way can you trust him anymore, trust is earned. Whilde you have the choice to blind yourself to these deep and real dangerous propblems and dote out a false sense of trust thatonly adds to the problem. Forget talking to him at this point or communicating whatyou will do if this or that cause it is dangerous to do in is frame of mind. Find a job, get many many friends and a support system and ask your elders to do the same for him. You will need to leave and secure a plan of protection and solvency for you and your family.
Do not make excuses for him and any bad actions. move in with another woman in a room mate situation or move back home if it is safer.
Read D&C 88, be brave. For what does it profit a man to receive a gift when he rejoyces not in the gift? it profits no one.
perhaps he will awake, I'd prepare to make plans of protection and to move forward . So sorry
