Am I overthinking or my classmate become more distanced?

One guy, he always drives ma and my classmate home. But he never showed much interest in me. But sometimes he was sweet, we had “networking night” at uni. And he decided to stay for pizza and I always wanted to stay. I asked him to wait me to drive home, and he eat pizza and went upstairs and waited me till networking night ended.
He always sit near me in one class.
But there was situation, when I slept with one guy from uni. We have same classes with him sometimes. And I told about it to my friend. And in class she came near me and said “you didn’t do anything wrong, he’s a bad person”. And he heard it, and suddenly became more distanced? Or it just seems that way? He stopped sit near on one class, but they removed table from corner he usually sit. And actually that’s it😭 now I’m thinking maybe I’m overthinking and he never was interested in me and that conversation in class with friend didn’t change anything?
Well he still drives us home, but he’s just a good guy and can’t say no.
And because in our class new boy students appeared he probably doesn’t need my company anymore and mostly talk with them. Yeah, probably I overthink and he just switched to boys group as his main friends lmfao😭
Am I overthinking or my classmate become more distanced?
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