AITA for maybe being clingy with a new friend?

I am an introvert and it’s really hard to make friends for me but I’m starting school again and want to make an effort to do so. So basically I just started a graduate program today and thought I had made friends with this guy, I’ll call him Jeff. We had seen each other during several of the pre-program events and even went to lunch a few days ago. We’ve been talking to each other ever since we meet at one of the first pre-class events, and I’ve been making an effort to be his friend by seeking him out to hang out with him.

Well today was basically like our orientation day and we had a ton of stuff to absorb relating to our classes and everything. Everybody was drained by the end of the day and even I didn’t want to talk with Jeff but figured I’d try and make small talk. The parking lot is like a 10 min walk from the building we’re in. As we leave the class He says “okay, see you tomorrow, I have to go the bathroom”. I say “see you tomorrow”. But I left something behind, so about 45 sec later I come back and he’s walking down the hall.

I kind of feel like shit now because I felt as if he was really someone wanted to friends with me but it seemed like he just said he had to use the bathroom to get away from walking back with me. Any advice on how I should interpret this situation?