Is it normal to start fighting a lot with SO after a year?

I'm almost on my 1 year anniversary...in two days actually. Lately, my boyfriend and I have had a ton of arguments. Not super crazy ones, but just annoying ones that have caused us to need to be alone for a few hours. We always sort it out in the end, but it is exhausting. Is this normal after a year? Is it because we are out of the butterfly stage?

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