i could change my mind tomorrow or next week, or next month on this whole question, but today...
if the person is completely honest with you and you're with them, then yeah i think you can fall in love with someone (to a certain extent) online (i really think to fall in love with someone COMPLETELY, you need to have some sort of physical contact). but how successful it will turn out is a whole different question...
*changes subject a bit - forgive me, i'm easily sidetracked *
i've never fallen IN love but i've definately loved people i met over the net as more than just friends. but i've only had one successful relationship that started out on the net, my last boyfriend.. and i think that's because strangly enough he only lived a few blocks away from me. we didn't have to deal with all the stresses of the whole distance thing (and time) which were the main reasons for my other online relationships to fail (though i've kept great friendships from them). distance is hard enough.. i dated one guy from montreal for awhile and it was really diffucult only seeing him every couple of months...physically being with him for a week here or there and then going back to talking online was terribly annoying. if it had been serious enough, one of us would have moved, but it didn't get that far, i was young and not really into changing my whole life for someone else so of course we ended it. but time can be a huge issue too. i got involved with someone online and we'd planned and planned to hook up for what seems to be forever (DAMN DISTANCE!!!), but by the time we were close enough together to meet everything had changed, we took too long. i'm sure had we met months earlier we would at least be able to say we had a great time together. now, we STILL haven't met, and all i wanna do is drink some beers and watch hockey with the guy !!
distance and time can be a real whore (though not impossible to overcome). but would i try again??? hell yeah ! because i think just like in "real life" it's possible to meet someone online, love them, meet and live happily ever after. okay, noone lives happily ever after but it sounds nice !