<human>: My girlfriend cheated on me on Saturday night.  She was drunk and went home with a guy we both know (him and I were never on good terms).  They slept together, and I found out through a friend of hers, later confirmed by my (now ex-)girlfriend

So I realize it will get better, and I'm doing my best to try and forgive her right now, that is, not to be so angry.  I did break up with her, and I told her we will not be getting back together, but we have a lease together, and we have to live together for a couple of months.  I am seeing my counselor in the morning.

Here are my problems that I really need help with:

1) I need to stop fricken crying.  I can't do anything to stop crying.  I had to call into work today and skip class for that reason.

2) I can't eat, and I feel super nauseated.  I don't think I can keep anything down.  I can get some V8 I guess, but I'm scared to go in public, in fear that I will start crying again.

3) I cried in front of her a little bit ago, and I've been trying to not be sad in front of her.  She tried to hug me to comfort me, and I backed away.  Was this the right thing to do?  How could I have handled this differently, if not?

4) I want to stay close with her family (except for her sister).  How  can I do this responsibly, without hurting myself or causing unnecessary pain to her?  
Thanks in advance.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: I can't stop crying, I can't eat, I can't hide my emotions in front of her, and I don't want to lose the relationship I have with her family.  Help.