Does he like me or just wants attention?

I know someone as a Teaching Assistant at my university. We met around 4-5 years ago. Worked on a project with him before I graduated, and another one afterwards.

We did online meetings for the second project. Now it's over but we stay in touch in a weird way. Whenever I post a cute picture online, he'll text me. His texts are mostly work-related random texts. This one time he shared a linkedin job post relevant to my career. Honestly.

But I'm deffo into him - he is funny and all. I don't know if he is serious or just asking for attention. Another thing, he recently asked me if I'll be attending an event at his new university. He also asked me to ask my work mates to register for the event. So what is going on.. does he have the potential to be serious?

Does he like me or just wants attention?
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