I'm with a married man who has told me he will leave his anorexic wife soon
Why would you stay with a married man?
Because he said he loves me and he is planning to leave his wife. I am going to tough it out so him and I can be together when he ditches that woman.
It can be difficult to end a relationship but you shouldn't be with a married man.  People will think you are a homewrecker.
I don't want to hear it, he is in love with me and vice versa.
Married men will tell you anything to get what they want, be sure he is telling the truth. Besides his anorexic wife seems to be having problems, why would you go with someone who leaves his sickly wife?