You can do better. It started one night when we realized that we were both pining over the respective guys that we were seeing (or maybe more accurately, trying to see) and evaluating our own behavior towards them, asking what we could have, should have, would have done differently.
Then we realized that we could have, should have, would have done nothing. If the way these men were treating us was making us unhappy, then why should we be questioning ourselves? And "You can do better" was born.
We realized that if someone's behavior is a source of unhappiness or discontent, then not only would we be unable to change the person to make us happier, but it wouldn't even be worth the effort! So we made a list of everything that made us unhappy, everything that we should not allow ourselves to settle for, and said that if someone we were seeing belonged on the list, then we could do better. Sometimes it's funny, sometimes it's heartbreaking, but it's always true. And once it was written down, it was like a big dose of reality and empowerment rolled into one.
The purpose of "You can do better" is not to set impossible standards or refuse to compromise. "You can do better" is about not compromising respect and fulfillment. It doesn't matter if he's into you or not, but if he can't pull it together for you, then you can do better!
If he says "I was wearing ironic t-shirts before it was cool," then you can do better!
If he cheated on you with someone he met at a gas station, then you can do better!
If at any point in the relationship you feel it necessary to use a lie detector on him, then you can do better!
If during your date, you get a fortune in your cookie that says, "Watch your relations with other people carefully; be reserved," then you can (probably) do better!
If when he takes your hand, the first thing that comes to mind is "I can't wait till he lets go," then you can do better!
If you met him on a reality TV show, then you can do better!
If he has appeared or could possibly appear on VH1's "Tool Academy," then you can do better!