Is this the beginning of the end of our relationship?

Over the last couple of months my boyfriend has been easily annoyed with me.
We live together and have done so for almost 2 years.
Lately it's like i can't do anything right. One example : he's a lot taller than me, and we have some very high cabinets in the kitchen. When I ask him to get something for me he'll sigh but do it and act annoyed over me bothering him. Another time i crawled onto the counter to reach for a glass when he came into the kitchen. Then he looked at me really weird and asked why I didn't just ask him to get it for me.
I know it's a small thing, but it's just one example. He gets annoyed with me easily and i don't know if it'll blow over, or if I should brace myself for him breaking up with me.
Is this the beginning of the end of our relationship?
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