I don't see too big problem with still ML because if the sex is that good, trust me, he would not feel he just settled for you.

I have gone down the same road with W, and once a lot of issues got resolved, I found that for a man (at least me) you should be able to pick up some kind of body language from him that will let you know subtlety that he is enjoying it enough not to settle for it.

Just my 2. Hope it helps.