I didn't read all of the responses.

NO. NO no no no no.

Go. Just get out.

I don't care who argues what about morals or mores or ethics.....

GET OUT EVEN IF YOU DON'T WANT TO.

ETA: My answer is based solely on the OP's question.... TONS of red flags pop up for me. I feel that he might have an agenda. I feel that he knows what he's doing. I feel as if he's dragging you into something....I don't know what and it may just be that needs help. Or maybe something else.... But so far, he's a liar and a cheat. Aren't you worth more?