<human>: I've never necessarily been an anxious person. For the most part, I play it as it lays and just go with the flow. I've been single for the larger part of 2 years and no I'm not one of those "forever alone" kids, but I have someone that I care about deeply and the thought of her leaving me, thinking poorly of me, etc. makes my stomach feel like it's the aftermath of a black hole. 

We met online 2 years ago when I was 18 and she was 17 and have been close since then, we've even gotten to hangout with each other for a very limited time, but still not enough. I know that she cares about me as I care about her, we're about 2000 miles apart from each other and we really only talk on skype and the phone, but there's still so much affection. We are dating/together now, at least it seems to me like we are and it's been around 6 months, with 2 years of a strong friendship backing it.

This anxiety. *It's a bastard!* It keeps me up at night, leaving me to think that she's found someone better, that she doesn't care about me anymore, that her looking at me disgusts her. It's so absurd, because she always reminds me how much she cares, but there's that lingering anxiousness that I have. I feel like every moment I'm not talking to her she's slowly forgetting about me and wanting to stop acknowledging my existence.

Could you distill the essence of the text into 1-3 sentences?
<bot>: I might be neurotic, but I just need some help in understanding ways to cope with this irrational anxiety I have of this girl that is technically my girlfriend not liking me anymore.