There is always a possibility that he can develop into something more. But knowing his history with marriage and the fact that he has been single for 12 years, I just don’t think that he is in a rush to do that. You don’t have to give up all hope, but I want you to think about it from his perspective. At one point he loved three women enough to marry them, and for whatever reason it ended in divorce. With each divorce comes more fear or being in a committed relationship, fear of repeating past mistakes of giving his heart to someone and it not working out. Therefore, his heart may be guarded. It may take him awhile to trust someone that must to be totally committed to them in every way.
The emotional attachment could be more than a friendship level. He introduced you to his family, his child, you guys go out and do things. I think that he sees you more than a friend or sex for that matter. It’s just the matter of trusting another women with his heart. See whether he commits has nothing really to do with you. It has to do with whether he is ready to be on that level with someone again. For him, where you guys are at may be fine. This is because like I said before, its less stressful. You are like his girlfriend, but not really. Meaning all he has all pluses of a relationship, but none of the downs of the relationship. This may be why he wants to keep it like it is. Because it less stressful to him, and more safe. You are like a girlfriend, but he doesn’t have to answer to you if he doesn’t want to. He can do whatever he wants to (if that is what he chooses) without having to explain it to you. The only sure way that you will know that he is ready to commit to you, is that he will tell you himself. Otherwise there is nothing that you can do to force it. You can of course have a conversation with him, an honest non threatening one. You can say: “ You know I have really grown to like you, and I get the impression that you like me. I enjoy the time that we have together, and I was just wondering if you ever would like things to get more serious between us” Ask him his intentions so that he does not feel pressured by you. And if he says that he does not want a relationship, right now. Then you can ask him when does he think, this would happen. If he says I don’t know. All of those are signs that he does not want a relationship. If he did, he would say it. Listen to his answers when you’re having this conversation, because he is going to mean what he says. Treating you like his girlfriend, for men, does not equate that they want a girlfriend. They just want the “girlfriend experience.”