Update: Man#1

So remember Man#1 (let's call him B), who is a cute hipster but took me to a horrible sushi place for lunch? He texted to ask me out to burgers...that was last weekend and I told him "Sure! I'll get in touch with you next week!"

But I haven't.

So can I just ignore him? That's mean. The alternative is to write and say that I'm not interested, but that's kind of mean as well. Or I could get burgers with him, but I would rather spend my time with people I really like.

Advice?