Is he just a nice guy or interested in me?

I attended an online seminar at my university last week. Along with 2 guys and 1 other girl, I was in a group of 4. I opened a text bar to assist one of the guys, Joey, who was having trouble writing something on our group assignment.
The seminar continued last weekend but it was in presence. Joey arrived at class a little late, so he took the only available seat, which was next to me. We had never met before expect online doing our group work. He grinned broadly and said, "Wassup," when he sat down next to me.
Joey and I have spoken a lot those two days in the seminar. For instance, he would ask me random questions like whether I had already presented my topic or would just show me at random how he scored a perfect score on the seminar quiz (aside from the group project, we all had a solo project). I thought he was lowkey teasing me the entire time. For instance, he grinned and said, "I didn't want to do the exercise with you anyway," as I was about to perform a partner exercise with the girl standing next to me instead with him.

We had to complete a partner exercise the last day of the seminar & he was also jokingly teasing me again. He said something along these lines in front of our group members: "You got me if I get anything wrong," He then gave me the fist bump after our presentation and said, "We did good." (he didn’t do this with the other 2 group members)
I noticed him wearing a "love" necklace, but it honestly didn't look that expensive. I surmised that he might have a girlfriend, but I obviously didn't ask him. I asked him some questions regarding the exam after the seminar. He then asked about my major, so I did the same. Then he gave me the fist bump again and said something along the lines "Okay [my name] take care, we'll see each other around."
I'm not sure if he’s just a very nice & open guy or if he was interested a little bit. What do y’all think? And why would he say "We’ll see each other around” if we don’t even have any common classes? 🤔

Is he just a nice guy or interested in me?
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