If my co-worker arbitrarily invites me to the office to see him next week after I already quit is he interested in me romantically?

Over the last month I realized my supervisor has been nicer to me than usual and I think flirts with me e. g. by commenting on my shirts and asking why I won’t ask to get to know him more. I’m technically done with my internship and did all the paperwork that needs to be done. However, in the last week he wasn’t in the office because he was suspicious he would have covid. He then messaged me saying it was sad he couldn’t be there on my last day and invited me to the office on Monday. It might just be a friendly thing but i think maybe he wants to see me once more? I can’t even tell if he wants me to come to spend the day or if he just wants to say bye. The others in my team also liked me but they never really showed serious interest to see me once again except casually mentioning it. Could there be something more that this guy wants?

If my co-worker arbitrarily invites me to the office to see him next week after I already quit is he interested in me romantically?
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