I usually don't give feedback on advice other people have given, but moving to live with somebody that you've known on-line for several months and never even met in person is terrible advice. I was lucky to have visited a forum for long distance relationships for a while. There were people there who tried doing that. Most of the time those stories didn't have happy endings at all. If you want to pursue a long distance relationship, the smart way to do it is to keep it long distance for at least a year and make sure to visit in person several times before then. If things are going well at that point, then consider moving to be with the other person. Otherwise, you're risking way too much for something that probably won't even work out. It's dangerous too as I've seen stories of people having all of their property stolen or getting beaten until they were black or blue in the face. Most of the time, though, people just ended up feeling really homesick and not liking their partner as much as they thought they would, but feeling trapped after they'd given up everything for the move. It can work out sometimes, but that tends to be more the exception than the rule.
To answer your question, most people who pursue relationships that start off long distance do have strong feelings before they meet. That's why they decide to pursue a long distance relationship. Otherwise, they'd just say it wasn't worth it and move on. Even with the feelings being so strong on the phone or when they're chatting on-line, half the time, at least one person thinks the chemistry wasn't there when they met in person, and they break up after that.
That's not to say that it can't work out. My husband and I are a case in point of a relationship that started off long-distance and ended up working out. It even took a while for my feelings for him to warm up. But you should give some thought as to whether you feel it would be worth having a long-distance relationship with her. They're not easy. If you aren't sure about your feelings for each other, you might want to keep things at the friendship level for a while and then see how things go.
“This planet has - or rather had - a problem, which was this: most of the people living on it were unhappy for pretty much of the time. Many solutions were suggested for this problem, but most of these were largely concerned with the movement of small green pieces of paper, which was odd because on the whole it wasn't the small green pieces of paper that were unhappy.” ― Douglas Adams, The Hitchhiker's Guide to the Galaxy