My spouse and I are at an impasse over my not wanting to share. 

Some relevant background first: we have two kids (5&amp;2), we've been together off and on for around 7 1/2 years (mostly on). And we're smokers.

Now for the entirety of our children's lives I share my stuff with them. That's not an issue. We would order pizzas (3 because they have a deal and we like left overs) I would get one with toppings I like, spouse would get one he likes and then the other would be for the kids. I would normally eat total about half my pizza, the kids would switch between mine and there's (fine with me) and he would ear all of his some of the kids and the rest of mine... Okay sure that's fine. 

We get cases of pop and don't I've the kids any, so I expect half the case to be mine to drink as I please and the other half his. He'll blow through his (an admitted bad habit) and then start on mine. 

We'll get a pack of smokes and he'll blow through a bunch while im sleeping and then smoke the last one... Which bugs me because if I did that he'd be mad. 

So just in the last two days, we had some people over so I expected if we shared anything it would come out of both our portions. Out of a case of pop he had a bunch, his friend had a bunch and I had two cans. Annoying but okay.  Last night, his friends stopped by supposedly for a minute, he asked if I wanted to offer them some of the pizza we had delivered (showed up just before friends did) I said no because I only had a medium (pizza place screwed up the order, they're discounting our next one) and would be sharing with the kids for lunch today. I went to change the baby and get him resettled to bed and when I come back one of the friends are eating some of pizza... Later in the night when I asked spouse about it he said he offered his own and she didn't like his because of the jalapenos he gets on his so he offered mine instead..   wouldn't have been an issue except I already said no..

And then before bed we had two smokes left, one of his and one of mine. He had his, I didn't have mine, was saving it for later. I dozed a little and when I woke up went for my smoke. It was gone. First he said he didn't know it was mine and thought it was a splitter. But he didn't wake me to see if wanted to split it or ask if he could just have it. This has turned into a huge argument because I'm tired of having to share literally everything all the time. I don't get anything that's just mine. He thinks I'm being selfish.

Am I the asshole for not wanting to share?