This means he's not into me right?

I texted asking a guy friend who I have a crush on to meet at a bar to see a band with some friends. He responded back almost immediately saying yes. A few hours later he texted me again saying he couldn't make it because his holiday work party is that night. I'm wondering if this is just an excuse and he really just doesn't want to hang out. I guess what I'm asking is is this a sign that he's not interested in me?

This means he's not into me right?
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