Creepy, possessive, anti-social man

I had been exchanging a few emails back and forth with a seemingly nice and normal man. We progressed in our online flirtation to instant messaging. And, guess what? He's a tool! He is a tool with no social life at all. Not only is he constantly online... he appears to want to know where I am going and who I am going with. I decided to tell him I am no longer interested in meeting him and wish him luck in his search for love. He then gets made at me and YELLS IN ALL CAPS that I have ruined his week... seemed a little much.