<human>: Can you provide a brief overview of the text?

My gf (f19) and I (m18) have been together a little over a year, I am her first real boyfriend, and I truly belive she's the one for me. I've been in numerous relationships where I thought I was in love, and have never felt this strongly. She is the sweetest girl, she'd do anything for me and I know this, but I have a paranoia that she will eventually grow curious about other men, not neccecarily an insecurity about myself, just her curiosity. (she loves to experience everything as fully as she can). It creates trust issues which I already have issues with. And as ridiculous as I feel these feelings are, I need an outside perspective. Are they really uncalled for ridiculous thoughts? Should I detatch myself? (Also I know we're young, but I truly belive in this, more than i've belived in anything)
<bot>: I need to know if its unreasonable to distrust the undying loyalty of my gf, due to me being her first.