Background: we've been together for one and a half years. We don't live together but he sleeps over 4 nights a week. We don't share finances in anyway, we just take turns paying for stuff. He offers to pay for groceries and I let him sometimes. Maybe 25% of the weekly shops we do together?
Which brings up yesterday's incident. We were grocery shopping and he put a couple items in the basket that were intended for him only (clothing items). Nothing expensive, but it came out to 10 euros out of the 30 euro totals. Then at checkout, no mention of paying for those separately or transferring me the money. He just happily let me pay for everything. That's on top of reaching for the expensive organic eggs and ready to eat avocado. I'm a supermarket own brand kind of girl. Although I can comfortably afford the fancy versions of stuff i'm rather frugal and it pains me to spend unneccesarily.
So i was feeling rather let down by this attitude. He's usually so attentive and considerate, that I don't wanna consider him purposefully taking advantage.
Am i crazy to be irked? On the one hand, i always transfer him my share for any items that are mine only that he pays for. On the other, it's only 10 euros and after all he drives us everywhere and won't accept money for gas. I know my first instinct is to be cheap sometimes and i'm mindful to reign it in. But i dont want to accidentally swing too far to the other side and set myself up to be taken advantage of. So AIBU?