@discoinferno @The_Compassionate_Heretic is right on target. Relationships on the internet are largely based on fantasy. In real life, there are so many details and ways of knowing a person that we are hardly conscious of all of them. On the internet, the only thing that is there is words. Words are really good at one thing: creating a framework for a fantasy.
People fall in love with who they think famous people are all the time. They hear a voice on the radio and they imagine the person they want to imagine. The same happens on the internet. The only true test is if you meet the person, and you live with them for a while, and the feeling still holds.
I’m an expert at falling in love with fantasies. I was doing it 30 years ago when people placed one-paragraph ads in the Village Voice. I constructed a whole history and personality from those ads. I later realized that the fantasy was what attracted me. I love to fantasize.
I’ve done that on the Internet a lot, too. A lot. During one six month period a couple of years ago, I fell in love with six women (and they fell in love with me). Each relationship lasted about a month, but the intensity was incredible. In my defense, I was manic at the time, so I had an energy that was apparently somewhat intoxicating, and I lacked the judgment necessary to curb my passion.
I think that the internet attracts people who have more difficulty meeting people in the flesh. It also attracts people who are depressed. You can meet people without leaving your house, and you can build these total fantasies about them. You can call them on the phone, and love their voices, and get addicted to talking to them (and the phone sex is nothing to sneeze at, either).
If you meet—who knows? People only ever tell the stories of the successful relationships. Those are nice fairy tales. You don’t hear about the meetings that are disasters, unless they are total frauds or something.
So, you can fall in love with someone you’ve only met through words, but you better take that with a very large grain of salt. You have no idea how much fantasy is creating your image of the person. Your fantasy may bear a close resemblance to reality, or it may not.
This is not to say that people don’t create fantasies about people they know in real life. They do. It works similarly to what happens on the internet, even though you have a physical presence to deal with. However, over the internet, it is more purely a fantasy, and it is so, so easy to fool yourself. In that arena, I am a blue ribbon fool! Of course, ymmv.