Sorry you're having a rough day. I try my very best to keep myself grounded. I find it beneficial to just come on here and vent and sometimes the responses are very helpful, sometimes it's just nice to know you're not alone in what you're going through, and sometimes it's just nice to vent and clear your head.
As I've been encouraged to do, and sweetpea stresses above, find a way to take care of yourself during these bad times as it is quite important to take care of you too. It's hard to rememer that what they're experiencing or if they're pushing you away, angry, depressed, etc. has nothing to do with you and not to take it personal.
It's so hard to remember that the most we can provide is support and love. I have to remind myself of this almost daily as I wish there was more I could do for my hubby, but I can't change the way his brain works, I can't force him to get help when he's not willing or ready, and that he has to make a conscience decision to work through this.
I think the other piece of advice I've found most appreciated too is making sure you have healthy boundries with your loved one during their bad times and making sure you stick to those boundaries and know when it's turning very unhealthy.
Best of luck and chin up.