>>1 like what
>>3 said, it really depends on the relationship. If it's a boy/girl you don't know at a setting like a bar or a cafe or something, then you should take a chance and ask for his/her number, if it works it works and if it doesn't then it just wasn't meant to be. However there are times and occasions when you should let the other person make their move, they may not be ready but you can always talk to them about it as well. Shyness sucks but if you're with another shy person then you might as well make your move, however some people like shyness as a trait so you can wait for them as well. Waiting isn't always a bad thing but it's good to know when to make a move.