There is no way that he can actually be in love with you at this point. He doesn't know you at all. So that leaves three options -
1) He has some issues and you should probably steer clear of him. or
2) He is immature, desperate, etc. and doesn't understand what love is and has some issues.
3) He thinks you are a fool and that by saying that he loves you he might get some.
The second option is probably the least worrisome, but my advice would be to back away from this one.
Good luck.
Brought to you by Dating With Devon!