I read the initial post and skimmed the others but from my experience as an addict who has actually done this I would say that the whole situation is bad. He's testing the waters by saying that 'he would feel like he is using you'. It's because he IS using you. There's going to be far too many emotions for him to deal with after any intimate contact with you and it could be detrimental to his recovery. I know it was to mine. I would just advise you to stay well away from the situation and tread softly in the future.