Wait a little, don't keep sending messages, that will make you sound desperate and annoying! And whatever you do. Don't say hello? U there? Just start another conversation.. Ex: did you see that basketball game? See the difference? Hope this helped;) - katie
Yes if she wants to. If he really likes her he won't mind at all. If it does bother him then he may not like her that much and the girl should look for someone who will always welcome time and talk with her with joy.