Hello April, All you need to do is to click the person (avatar) whom you want to send a message. as the person's page pop-out, you will see the "message" box right beside the 'chat' box. If the word 'message' is dull, you can't send a message as it has been restricted by that particular member. on the other hand, when it is clear, then you can send any message you want to. :)

It isn't much harder than asking a question.