There are several great points here! However, if you are unable to control your anger and I've been there too. Then get away from the computer and anything else valuable! Take it out on something like pillows! That way any damage is minor and won't cost you a lot of money, you'll probably be more tired though!

What happened, Garry?

Jeff

Just state your point clearly and then leave it.

Take a deep breathe mate. Do some exercise. Make sure the "friend" is blocked & if she is that unpleasant, check out bitfinder anti virus/ anti hacking software.