AITAH for cutting off my friends?

I’m an upcoming college student. I was previously included in a trio and we have been friends ever since last academic year. We were all pretty close, sharing our problems with each other every now and then. We were inseparable in school and rarely hangout with other people.

Here’s the problem, I sensed animosity from one of my friends. I felt it whenever I achieved high grades or whenever I was studying / preparing for an upcoming quiz or exam. This certain friend would ignore me and barely talk to me whenever one of these events would occur. I tried to understand but lately it has gotten tiring walking on egg shells and having to deflate myself so that I could be liked by this friend.

There’d be a few sneak attack comments towards me that most of the time I can’t call out because it’d be too small of a deal if I did. One of these examples were them being upset for me asking them about their college applications. They responded with something about how it’s practically useless and then tried to shame me for picking a particular popular university.

Am I the A hole for cutting them off completely for something so “simple”?