What is he doing?

Hey y'all!

So last summer I went on a date with a guy who I really really liked (and I still do) but then we both left on vacation and we didn't text or anything, so I thought that was it.

Since September, he has occasionally replied to my IG stories and about 3 weeks ago he invited me to his place through one of his classmates (who is a close friend of mine)

since he was having a little reunion I suppose, but I couldn't go because I had a concert that night 🙃

What do you think this means? And what the heck should I do?