Okay, I hate to break it to you, buddy, but the poster above me is probably right...
You see, a common problem with a lot of people in countries that are not as economically sound as others is people using them for visas. If they marry you, they rely on you to bring them to your country. As a result, they have a free ticket to freedom at the cost of one person's broken heart. I'm not saying this in any racist or demeaning light... It has happened before. In some cases, they can be in these marriages where they're property, essentially, so they don't have the means to get out. I only tell you this to try to help make you cautious; I'm not saying that this is the case...
However, a friend of mine's one relative actually met a woman overseas and had a LTR with her. She casually mentioned that she wanted to come visit, but she didn't have the means. She had him deposit money for a plane ticket into her overseas account, and then he never heard from her again. So, it could be that she's looking for money. Or we could all be wrong and she could really love you. Who knows? To me, though, it's extremely hard to fall in love with someone you haven't met in person. It's rare if you find that.
Just be smart. Even if you think you don't look that good, there's someone out there who will think you look like the most beautiful person in the world. It's the inside that counts, after all. Don't settle for anything less.