Most Helpful Guy
You have to first figure out what type of relationship (how to relate) you want. After that, you can compose your thoughts. By your description, he is acting like a neglected dog. When you pet him or show attention, he tries to make up for his complete lack of attention. That drives people away. If you can get him to understand that and to try and restrain himself, he may be be able to have a healthy relationship with someone without driving them away.