Understanding to not be understood

Yesterday I was watching an episode of GR∑∑K and there is a scene where one of the girls is having a lot of problems with her family and her boyfriend suggests to forget them by just partying and having fun. This, however, was not the kind of support she was needing at the moment so she realizes that she would rather break up with her boyfriend because he is not what she is missing that aspect of the relationship and deep down they have known that they are not really meant for each other all along.   Here my friend said, "That is not fair! It's not his fault that he doesn't know how to handle her problems and how to give her the best support," which is true but...

I have been in those kinds of situations where my family has been going through many issues and other people don't really know how to react or how to give you advice. It's hard when you can't really talk to your friend about it because they won't understand, but it's even harder when you are in a relationship with someone and they don't know how to give you the kind of help you need. In those kinds of situations you don't really have the patience or the room to be "considerate" with others for not knowing what it feels like to be in your shoes, and even though it sounds kind of mean there is in some sense a moment where you understand that you will not be understood. So you step back and away, and deal with your own problems by yourself. 

Also, being in a relationship with someone is a lot about support, so if they can't give it to you then why be in the relationship with them? I agree with this girl's decision. Yes, it's not people's fault when they don't know how to give you support, but it's important for them to know and respect that you need to step away and find that help elsewhere.