A problem

This is not a big problem. I just need some advice.Thanl you to the preson that responds to this call.My friend Paul has been acting very strangely towards me. The only way I can communicate with him is email. He says I can email him anytime I want to. When I email him he does not respond to me. I know he is busy and cannot pay attention to me all of the time. The turth is that I am a person with Cerebral Palsy. I have also had two psychotic episodes. I have been  in different mental hopitals. Despite allof this Paul has stood with me through this whole process. I am in another relationship now. However, I love paul because of his attitude. My question that I need the answer to is- Why would someone tell you you could email them and then not respond to the emails you do send?