I'm going to act salty towards my friend for choosing a different school
Why are you salty towards your friend?
He's even salty towards me already because I didn't choose his school
Your friends have their own lives to live and the path they chose my divert from yours. You shouldn't be mad at them for wanting to pursue their goals in a different place.
Plus he chose an expensive school and I don't have the money to afford it
It's not either of you guy's fault. Sometimes life takes us in different directions but you two can still call and add each other on social media.