Do you, or do you not, hold feelings for this man? If you do, then you shouldn't hold back on them and just tell him how you really feel, and if he feels the same way, then you can both be happy. I understand that he has a wife, but sometimes sacrifices must be made for happiness. If you love him, then tell him, but if you don't, stop fooling him into thinking you are still into him. You are giving him a false sense of love and he seems confused. If necessary, send him a final email concluding the online relationship between the two of you. You are fooling yourself as well as him if you do not actually love him.