Definitely date for awhile, you can get to know someone online but you do miss part of the body launguage and little quirks people have, quirks that could drive you insane when you move in together. You need time to translate that relationship face to face before making such a big move. Being with someone in person is much different. Be safe when you met him, make sure it is public and never go anywhere private or alone with him. I met my current boyfriend on an online dating site, we met in public and went out to dinner, we dated for awhile before we moved in together. Stay safe.