If the feelings are real, the relationship is probably real too. I've started many relationships either online, through IM or through texting, and most of them lasted for at least a few months. They're not always as fulfilling as one you might have with someone you met first in person or get to see frequently, but they can be legitimate. I know I've had a few that were almost exclusively online/not in person, and they were legitimate, though I understand where you're coming from. When you're in a relationship and you can see each other a lot, it's a lot better to be able to see them in person and develop that relationship when you're face to face (which is why Skype often helps.)