Of course my first post is me bitching about something!

That's apparently what I do. My husband and I have been having some issues lately, and things have really come to a head in the past couple of weeks. I have been stressed about everything because the woman who raised me, my grandmother, is sitting at home right this minute dying. She had to go to the hospital a month ago and has been going downhill pretty fast ever since. It could be any day now, her doctor has only given her 6 months, so I am a basket case.
Add to this the everyday stresses of have two toddlers at home all day, and I am sure you can imagine that I am a little less than a ray of sunshine all the time. My husband apparently doesn't. You see, he has informed me that I am not allowed to be stressed out, it stresses him out when I don't act happy and wonderful all the time. Obviously, I don't care about him at all since I have been making it so hard on him.
He works you see, and since I don't, I shouldn't have anything to be upset about. He is the one who is out there everyday, "about to drop dead from physical exhaustion" while I am here all day, "with nothing to do but watch the kids play".
I am willing to admit that I have been bitchy (more than usual) lately. I am also willing to admit that sometimes I am not the easiest person to get along with. I have an expectation that people will behave in a certain way, mainly the way I want them too, and when they don't; I get a bit touchy. Problem is, I don't think my way is asking too much. I expect you to do what you say you will, I also expect family to stick together. If your family needs something, you damn well do what you can to make sure they have it.
Gary wasn't raised this way. His mother only calls on special occasions, and I don't know if she means to or not, but she also has this wonderful habit of only being available when it's convenient to her. I don't ever hear from his side of the family, asking about the kids, or how we are. They think if anything was wrong, we would call them. So I suppose they think "No news is good news".
The point of this long post is, Gary was supposed to buy me tickets to go to the Britney Spears concert next month. He didn't. They are now sold out. I.AM.BUMMED. He gets upset about my being bummed and starts yelling at me, because I understood him to mean he would actually go and get them when he said he would. He said he meant he would financially get the tickets, and it was my responsibility to actually go and physically get the tickets. I cannot stress enough that he NEVER SAID THAT. He also flaked on the circus, so now the kids don't get to go, because he said he forgot.
My question then is, what do I do now? If I tell him and he doesn't do it, it's my fault somehow. If I keep asking him about it, I am a nag, and he doesn't do it because he gets mad at me. He says I am ungrateful for all that he does, and that I should start showing him some appreciation, but I don't ever get any appreciation. Every single day he comes home, and the kids are alive and well, and I haven't slit my wrists is a good damn day. You know?

I pray that today is a good day, it's not looking good though.