We Follow Up on Our Promises
Did we say we'd go for drinks Friday night? Did we text you on Thursday night if you're still on for it? If a guy likes you, he's going to make sure that any opportunity he has to see you, he will.
If you do ever go out on a date and you're not sure if he likes you, know that if he gave you both a date and time for the second date, he's into you. If he's vague about when he'll see you next, things are far less certain.