What is up with this guy? ?

I'm 23. Hvnt dated in like almost 4 yrs. I started talking to thi gut whom I went to middle school w. Good looking a guess. The problem is I'll ask to do smthing and he wnt really reply back that much. Like yesterday, he said to get back w him if I wanted to hang out since it was his day off. So I text him later after work around 4. Didn't hear anything all night. Before he apologized for not getting back w me soon enough and said he'd be able to and promised. I dnt hold him too that tho bc promises cat be fulfilled all the time. I'll give him some slack on that. But is he ignoring me at times bc he likes me and doesn't knw what to say? And ya he's once text flirted. "I got in the mood for a beer after drinking one with you". So I dnt knw whether to keep texting him or just back off for a bit.