is this a good way to ask for someones number?

[:)☮]

ive been speaking to this guy on twitter. i like him quite a bit but just want his number instead because 1) it would be easier speaking to him 2) its much more private 3) seems just better than speaking on twitter. ive hinted really vaguely to him to give me his number but hes never got the hint (or he has just ignored it). i go back to school on monday, and we should still be speaking on twitter then. i will reply to him a few times then send him a direct message saying 'see what, its pretty awkward getting on twitter when im on school so it might be better to text? my number is .......... , just so im not ignoring you during the day! '
is this good, cheesy, awkward or just really random? any other ideas?