I think you'll be alright as long as he doesn't have your bank account #'s or a credit card, or SS #'s there's not much he can get from you. I would just cancel any and all emails you get from him and write him off. That's one reason i use a yahoo email addy, even though i have a bellsouth.net addy, that one i never give out unless i know the person.
JMO
Zip.