I still have feelings for my crush from when I was in middle school
Why do you still have feelings for him?
I still remember what we had and how he would talk to me.
It's perfectly fine to have lingering feelings for someone. It's a normal part of loving someone.
I don't have time right now but maybe in 10 years I'll date him.
Well he might not be available later but it is okay to still remember him and to have feelings for him. It would be good to see him and see if you could still be together.