Unfortunately you offered him the path which offers you the least. A friend with benefits is often neither a friend or a partner. They're a fuck buddy. They get sex, you get sex, nobody gets much more than that. It may be a gender stereotype but it's also undeniably true that men are generally better geared up to having sex with none of the responsibility that comes with a relationship. So really he gets to have you for his needs but you don't have him for yours. Even worse, you are left with the illusion that you have him when you don't. It's pretty obvious that he won't want the situation to change now because he's got things all his own way. The cases of friends with benefits turning into relationships are, anecdotally at least, extremely thin on the ground. I don't recall hearing off any and I've heard of plenty of friends with benefits situations. Indeed, the friends with benefits agreement could be considered a death sentence for any prospective relationship.
Nevertheless, if you're not getting what you want then getting less than you want will never make you happy. On the contrary, it will make you more unhappy than having nothing at all, certainly over the long run.
