Have you also checked his feedback and time he joined the site, if he has no or negative feedback I would be wary, especially if he joined the site long ago.
I agree with the girls above, but if he turns abusive, maybe ignore him or if it gets ridiculous lengths, contact him one last time and tell him he is harassing you and you will inform the police if he dosent cease. Sometimes these guys can be wolfs in sheeps clothing and try it on, you owe him nothing. xx