I say yes but I mean no

Or vice versa. Yesterday I had an sms conversation with a distant friend, an acquaintance, or as ze Swiss phrase it "bekannt". Somebody you know, but not very well. I thought we were friends, and he said he might come to Zürich tonight but would let me know. He didn't. But when I sms'd and asked this evening he said he's here. I don't know why I offered my guest room, to somebody who doesn't want to "impose". Well I know why. He wants to pick up a girl, and it's not gonna be me :) PS. Real friends call up and say "I'm in town, can I stay with you?". Like I would do with my friends. And yes, of course they can. Always.