You support her, dude. You listen. Just like what Hades is saying. Be there for her if she needs / wants to talk about it. You don't have to respond, sometimes a hug is the best thing you can give a person.
Ok, relationship advice from me seems a little hypocritical at the moment.
I went to work today, then I had a session with the counselor immediately afterwards. I just walked in the door when my parents called to check up on me. We talked for a while, but after having to speak pretty much non stop for two hours, there's not a lot left to say.
Now I can finally focus on important things, like supper.