I'm upset and frustrated with my friends, so I insulted them.
Why are you upset and frustrated with your friends?
They've really made me angry with the way they've treated me and I needed to get back at them.
I'm sure you're really frustrated right now, but you should talk to your friends about how you feel. Insulting them and fighting with them is not the proper way to resolve your differences. This type of action will jeopardize your relationship with them.
You don't know what it's like.
I assure you I do. Being angry at your friends is common, but insulting them isn't the way to solve the problem.