<human>: Can you summarize the given text in a few sentences?

I'm an American who has come back who lived abroad from a month after I was born and just came back to start my university education. I was raised in an environment where the culture's response to relationships was unfavorable. As I grew up, I developed this white knight attitude which still is a part of my personality as of now. The fact I lived a sheltered life didn't help me at all regarding approaching girls, let alone think about what to do in a relationship.

Fast forward to last week I've been texting this girl I've met online and we were having fun talking to each other so we got close by sharing day to day pics and whatnot and I finally asked her out. She accepted and I was on top of the world. We could actually meet up in the future since she lived a few hours away from me.
The problem that's affecting me is that every time I talk to her, the fact that I say cheesy things and become sappy because all I've learnt about relationships is from fantasy novels, movies and manga makes me think that I'm actually timing these lines right when in reality its not working out at all. Furthermore, if you add the facts that I speak my mind all the time doesn't help at all. I really like this girl and I've done nothing since we've started dating but creep her out with my white knight ideals from my childhood. I'm freaking out because its my first relationship and I think that if I fuck this up I won't have the drive to persevere relationships in the future.
<bot>: A white knight in his first relationship with a girl doesn't know how to what to do in it since what he knows about relationships ain't real. Needs help.