What does it mean when a guy says he's busy?

I met this guy a couple weeks ago...

he works and works out pretty much on a daily basis.

He hasn't talked to me for a while but he called me Friday and said he felt like a dick because he hasn't texted me and he's been super busy. We texted for a while today.

Do you really think he's busy or am I just over-reacting?
What does it mean when a guy says he's busy?
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