I used to have a crush on my 8th grade math teacher
How did that crush end for you?
I was so depressed when I found out he had a girlfriend.
While it is okay to have a crush on someone, it isn't okay when it turns out that the person is in a relationship. It's wrong not to respect other people's relationships as it can lead to cheating and infidelity. Instead of crushing on a taken person much older than you, try to find someone else who is both single and closer to your age.
Yeah yeah buddy. Don't preach to me like I don't know that. It was a long time ago.
Well you really dodged a bullet there, you should admire your teachers. Like can you even imagine if they ever reciprocated their feelings to you? It would have been wrong on so many levels.