WoW first of all, is he married to you?
You can not make anyone fall in love with you. That is something that just has to happen no matter how many times you use sex to try to guide him in. Don't try to break up his marriage thinking that he will just fall into your lap either.
as far as his marriage and you are concerned you are a fishing buddy that he can visit and mess with . . . . he can get some and you change the sheets the next morning by yourself.