Well, once you start falling for someone then you start having expectations. Obviously you two have now two different agendas: Him recovery and casual sex and you a relationship.
I would suggest you protect yourself and break it off. If you can borrow the book, read "He is just not that into you"
That will put things in perspective for you.
If he was truly into you, recovery or not, he would take the risk of an intimate relationship. Even thought it is advised that we wait until we have one year sober, it is not a set rule and if he truly was into you he would probably bypass that "rule". Many (included myself) have done it before....just saying.