BOOMmaker

Alright, I'm a bit confused, so I'm just going to see if you lot have any ideas on what's going on. So there's this girl I like, and recently I've been able to start texting her (first time I've ever texted a girl), and we've been having pretty good conversations. But now, for some reason, I'm getting this odd, agitated feeling when I think about her. She hasn't done anything wrong, or even anything that I could mistakenly perceive as wrong, and neither have I, as far as I know. But there's this odd heaviness to my chest, almost like guilt, and the agitation I've already mentioned. Any ideas on what's going on?