A man goes to a class reunion his high school classmate he pined for only to find out she became famous.

Hi tony18,

This sounds like a synopsis more than a logline to me. You are telling your story in a short paragraph. I suggest
1- Correcting grammar/spelling
2- Use the logline "generator"
and/or
3- Click on the "Formula" icon at the top of this page and study the content carefully.

Good Luck