Try to think of what is at the root of why he won't connect with you. You then need to try to disarm him, so he feels comfortable around you again, starts to want you around, and then hopefully starts to need you. For example, just make him feel completely relaxed around you without pressure to reconnect. Treat him like you would treat a really good friend. There is no guarantee he will come back to you but being accepted and liked and treated nicely helps a person get back to a point where they don't fear what will happen when they are with you. After you get to a point where you are friends again, try some smiling and subtle flirtation (like eye contact). Eye contact tends to draw men in somewhat. See how it goes from there.