Or is it a really bad sign?
I was feeling a bit low (mid 30s, single) near Christmas, had slightly too much to drink
and thought I'd try OLD. I had a date with a man between Christmas and NY and I'm seeing him this weekend too! 
He's very pleasant and I like him, but I'm not sure if I really, really like him. It's my birthday on Monday and I just want to keep it to myself in case it makes it weird- I think he would maybe try to buy me a gift.
Is it odd to purposely not mention it tomorrow? Is it a really bad sign?
(I'm very very new to dating never mind OLD)