How long should you know a guy before you ask him for his number?

[chachacha]

There's this guy that i like and i think he likes me but we havnt spoken yet, so i am going to talk to him tomorrow for the first time. i was just wondering if we get on really well, i'm going to want his number right? however next week is half term (week where you get a week off school) so he might forget about me in the half term if i dont ask for his number. So do you think knowing someone for less than a day is still ok for asking their number? tell me what you think!

[SuperImmortalKing514]

If you get along well and you feel a click, go for it. Otherwise, I'd wait. Its only one week anyhow, you'll have plenty of time with each other.