Anxiety Attack

This guy that I have been seeing for 6 months has anxiety attacks. He will see a red spot or something on his penis and think that he has caught herpes from me. I think he thinks he can get herpes by simply touching my skin. We have not had intercourse or much of anything else. He has been tested twice now and both times negative. He gets nausiated and starts to panic. I am getting very tired of this. I have herpes and I dont worry like that...He told me he would rather get cancer than have herpes!  I told him no you dont! I have had cancer too, and I would much rather have the herpes. He sees a counselor but I dont think it's helping much. Is there anything I can do to help him or should I just stay away from him and maybe he wont' get anxiety attacks.