I think the girl i've been talking to online is fake, how should i react?

[Ash]

I've been talking to a girl online and we've agreed to meet up. She cancelled the first date. She has been saying how much she likes me and how much she has fallen for me, and honestly I feel the same. However there are some inconsistencies with the things she has said, and she is not on facebook or twitter. She is also miles out of my league in terms of looks. We talk for hours and hours at a time online and through texting. I guess I'm asking could it be someone pranking me like what happened to Manti Te'o, am I being paranoid and how should I react if my suspicions are correct? I fear I will be so angry I will do something stupid like find and beat the culprit or just do something stupid to myself. I've invested a lot emotionally as you can probably tell