Is he really interested in me or busy?

I reached out to a guy I used to work with along time ago. A week ago I messaged him asking how he is and he said doing great and so on. Then he told me he's glad I reached out. We were texting back and forth for a whole week both asking each other questions and turns out we like a lot of things alike and we kept making each other laugh. About 3 days ago he asked me if we can go out to watch a movie and get something to eat that its on him. I said yes for weekend coming up. Our convo kept going as usual then 2 days ago he says he likes talking to me. So the part im confused he barely texted me yesterday and today I feel he's keeping the text short or he leaves me on read like I dont get it not sure if he's busy or what but I feel if he really is into me he would find a way to message me

Is he really interested in me or busy?
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