(((((((((((( coldfusion )))))))))))
Welcome to PC
I think the replies here are pretty much on target. I remember being together with the same guy for almost 2 years through high school too. I remember that what I thought was the most important things in the world to me at 16 had changed when I turned 18. And that's because as we age, grow, mature our goals change and our minds open to different things. This happens throughout our lives....it's not just a "teen" thing.
I'm sorry that this threw you for a loop.....I'm sure you are hurting and understandably so. What I can tell you is this.....with each relationship we have in life, it gives us a basis to learn and to apply what we've learned in that relationship to the next and the next and the next. If your relationship with her was meant to be for a lifetime, then you will both find your way back to each other at some point.
Since your ex wants to grow and learn of other things out there does not discount what you both meant to each other through high school. I'm in my 50's and every now and again I chat with my old high school sweetheart. We reminice of the old days and share what's happened since then in our lives. We truly loved one another back then, but our relationship was not meant to be in that light for our lifetime. We will always love and respect one another for what we brought to each other during that time, but we know it wasn't meant to be forever. I know that it was still painful for both of us to go through at the time, but we did heal and we did move on....just as you will.
I hope you can find some peace soon. I can say that if it's possible to stay friends, you will have the best of both worlds....and a connection for the rest of your lives in your hearts and memories.
Take good care of YOU!

sabby