Friend commited suicide..how will I do?

I'm sorry to hear that. I would give it time, try to find things to take your mind off of it for a while, and see a counselor if you feel it's really impacting you negatively. But I think what you REALLY need to do, is be there and focus on helping your friend, who DID know her personally, and was very close with her. Sometimes we have to put those we care about before ourselves and help them when they need it.