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

We've been together for 3 years, we are each other's first. We get along quite well, she's my best friend. We have our problems but there's been nothing we haven't worked through together. Our sex life is good and we don't argue yet I can't help but feel a sense of yearning to play the field a bit and meet other girls. I'm ashamed and feel horrible about it.

There's a girl that I work with that is interested in me, and I had a crush on her before I even knew her, as she lives in my area and we see each other around. The thought of throwing away what I have with my current girlfriend makes me feel disgusting as she's great. She has a bad self image and anxiety and I don't want to hurt her in any way, I love her. She's done so much for me, she helps me with my own anxieties in a way i don't think anyone else ever could. She knows me inside out, and I her. We have an understanding of each other's headspace and are comfortable with each other in that sense completely.

I've spoken to people in my life and have been told that I'm too young to be worrying about things like being in a relationship and that I should be making the most of my youth and worry about being happy. On the other hand I've been told that what I've got is good and I should be happy maintaining it. I guess why I am posting this here is I'm looking for a bit of perspective and advice please. I'm happy where I am but it's like a "grass is greener" situation and it's doing my head in. Thanks.
<bot>: I have an ideal relationship, I should be content but I feel the urge to meet other girls and throw it away.