What does it mean when a guy says "I have to get ready I have this thing to do"?

I have this friend...he's drives me to work every morning. He's rearranged his morning work time schedule just so he can drive me. He even comes to pick me up though we only live 1/2 block from each other. He has shown a lot of interest until recently. I asked to borrow something and when I picked it up he told me instead of bringing it back "because I have to get ready, I have this thing to do", I can bring it tomorrow. What does that mean? Is he blowing me off?

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