That pesky Y-chromosome thing

So. I bit the bullet and texted him. It had been 4-weeks since we had spoken. It started off good, until I figured out he thought I was another friend of his w/ the same name. Then he called, from his work, and we talked for like 3 minutes. He apologized and he had to go back to work.

Should I be flattered or insulted that he thought I was someone else? Especially when he was using the term sexy in the text?

Or was it a wake-up call to him, and I threw him for a loop? And there's nothing to worry about?

BTW -- I had never called him before, or texted him, so it was out of character and he wouldn't necessarily know my phone/mobile number.