<human>: Give me the gist of the text in a nutshell

I've been wanting to break up for a while now. Reason being is I don't just don't want to continue this relationship into the distant future. I want to find someone I can imagine staying with for the long term.

However my gf has recently been unemployed. Living with grandparents, and her mother has just died. She's I stuck in this depressing environment and has to deal with looking after her grandparents (who aren't in the best of health), and her brother who isn't self sufficient.

She has also had a history of depression and is obviously is going through a horrible time.

To add onto all of this, we don't live close. It's a four hour drive for me to go and see her. It's been a difficult last few months, and I've tried my best to be a loving. And supportive bf.

But I feel like the only thing is that's keeping us together ATM is me trying to get her back on her feet. I love and respect my gf and I don't want to break up with her while she's having such a traumatic time. I don't want to be kicking her while she's down.

But obviously this is making me unhappy too. I can't move on with the things I want to do with my life.

My only concern is when is an acceptable time to break up? I'm obviously not going to do it just now. But I feel like there will never be a 'right' time to do it. 

I feel like crap talking about this, but I feel like a fraud staying together with all these feelings inside me.
<bot>: I'm unhappy in relationship, she's unhappy with relationship, when is it  the 'right' time to breakup with grieving depressed gf??