Is it normal i miss a past that didn't happen?

I miss high school, even though those were the worst years of my life. I think it's because I had a bit, just a teeny bit, of verbal childhood abuse and so never came out of my shell.
I have great parents by the way, it was just coked up verbal abuse from my older sibling.

When thinking about the normal teenage hallmarks of developing, like the first party, the first kiss and the first girlfriend, I wonder what might have been just a few years ago. If I hadn't been so anxious. If you're a teenager reading this: do not be like me. Do not cope with being pushed around by hiding away. I used to think nobody liked me back then. I was wrong. And that's why I'm typing up this question - I could've done something to fix my problems.

...is it normal that I miss my school years for what they could've become, instead of what they were? Any suggestions?