What does it mean when a guys texts you 'srry gtg ttyl'?

curiousgirl5678
I texted him one day just saying hi and I got that response. Is he busy or does he just not want to talk to me. And he still hasn't texted back. It's been like one day. Am I just over thinking all of this?
What does it mean when a guys texts you 'srry gtg ttyl'?
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