Silly arguments

I am not bipolar but I live a bipolar life, ups and downs, lows and highs. One minute I am happy, one minute he pisses me off and it ruins my day. Like this morning, he comes in the bathroom while I'm in the shower, I was done, so I opened the shower curtain, got out while he's in the bath tub.

Him: Close the shower curtain
Me: Just close it for me, its 2 inches from you
Him: No you opened it, you close it
Me: Will it kill you to close it, it's 2 inches from you? What's wrong with your hands?
Him: Why can't you close it?
Me: I don't have time for this, It's 8:00 am and we're arguing about a shower curtain just because you don't wanna close it yourself~
Him: Am I wrong for asking you to close it?
Me: we have 2 bathrooms, how about you just use the other one when I'm in this one?~ Left

At this point, I was losing it. You might think that this was really an immature argument, and the truth is that's what's pissing me off. Him is my husband. Mind you, we have 2 bathrooms, but he doesn't want to use the other bathroom, his reason: it's too cold in there. Mind you, the other bathroom is bigger than the one in the room. Mind you, he always wants to get in the bathroom when I'm using it. If I lock the bathroom, he will knock for me to open it instead of using the other BIG bathroom. Before the shower curtain incident, I was in a great mood, everything was fine and merry. Now, because of a shower curtain, I will be pissed all day. I left the house angry at how stupid the argument was, and of course I will get there tonight in the same mood! I can be happy all day and something silly like this happens, and it will ruin my whole day. Him and I, we never have big arguments, we never have major issues, we fight over little things over and over. ~The tv is too loud, No it's not too loud~ Im turning the heat on, No don't turn it on it's hot~I like the couch facing east, no I want it facing west.....Ups and downs, lows and highs, that's the story of my life.Some days, I wonder if marriage is for me, maybe I'd be better off alone.....