<human>: Hey!
Okay some background:
 

* My friend Cathy and I have been friends for about 10 years now but are both at different uni's. We have a small friendship group and have had for the last few years, going on holiday and hanging out etc.
Since going to uni we haven't been as close and have had a few disagreements about contact and such (never arguments because I hate arguing and used to be a bit of a doormat) . I always took the blame and we would promise to talk more..which never really happened. 
 

So now:
 

*  At the end of last term we had another conversation about keeping in contact and both promised to do more. However, nothing changed and none of my calls were answered and texts were ignored, making me more annoyed. 
 

* Then, Cathy stopped all contact without any reason, she seemed to have done this with all of our group of friends and so I gave up. 
 

* But then she started to ring others and try to pick up contact again, except for with me. We had one conversation a few weeks ago now and I didn't want to start an argument so we just had a pleasant catch up, but with no apologies from her.
 

The problem:
 

* It's my birthday soon and I generally invited my friends to come and visit me, but didn't send any specific invites or one to Cathy as we hadn't spoken and at this point didn't know if she was angry at me or just wouldn't respond, and I was quite angry. 
 

* But of course she found out and is now VERY angry and has said some pretty mean things to me and has hoped that everyone else wont go because she isn't invited, and as of yet hasn't apologised.
 

* So, I don't know what to do, I want to stick to my guns and get an apology to stop her acting the victim before I invite Cathy but most of my friends have seemingly forgiven her. What should I do?

Can you summarize the given text in a few sentences?
<bot>: my friend is excluding herself and then blaming everyone and i am sick of it but now she's annoyed, grrrrrrrr