What should I do?

Long story short went in 4 dates with a guy they went real well he even introduced me to his friends, said his mom would love me, and on our last date started holding my hand in public and kissing me bye. I went on vacation and we talked throughout my trip, he was liking my stories and even liked the story of me flying back. However, ever since I been back there’s been a shift and we haven’t hung out yet nor have I heard from him in almost 3 weeks (I texted last). He has liked a couple of stories since then, which is bare minimum, but I’m thinking he just be somewhat interested. The last story he liked was this past weekend (although he hasn’t been liking my insta posts and I posted yesterday as well) should I like a story back to show I still have interest?Or does it give too eager or like I’m trying to get him to text me. Im not sure what’s the reason for the random shift. At the very least I’m not going to text bc I already reached out once since I get back and I deserve effort from his end.