How do I give him my number without seeming desperate?

Anonymous
a boy just moved to my school, he's really nice and sweet we talk a lot and its usually him starting the conversation he usually goes for bad girls, and he's a bit of a bad boy himself, I want to see if he would be interested in my but I don't know what to do, how do I give him my number without seeming desperate how do I know if he's into me or not?

1- don't start saying 'why would you want a bad boy'

2- don't hate :)
How do I give him my number without seeming desperate?
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