<human>: Me and my gf have a good relationship, we've had our ups and downs but we always make up and we're always having fun with each other.

The only issue I have is that whenever something upsets her or she gets stressed out, she acts very cold towards me. We will be texting and she only replies with "no" or "ok" or if she's really bothered by something, she'll just say "night" and not text me for a little while. Whenever this happens, at first I thought it was because of something I did or said, but after she gets into a better mood, she'll tell me that it was something else that was bothering her. 

I guess my question is, is this fair? Is it fair for her to act like that towards me when I have nothing to do with what upset her? And I also try to cheer her up, but I can rarely seem to do so. It's usually her friends that will cheer her up, and I'll be honest it hurts me that I can't cheer her up like that but I've just come to accept it.

Can you provide a brief overview of the text?
<bot>: My gf treats me coldly when she gets upset by things that have nothing to do with me, is it ok for her to do this?