Other people’s kids irritate me lol

Is it just me or do others not like being around other people’s kids for long periods of time lol. I’m currently 31 weeks pregnant with my first but i helped my sister raise my 7 year old nephew. I admit i spoil him rotten and in my eyes he can do no wrong lol. When other kids do the exact same behaviors as him i immediately roll my eyes or lol am like “get yo damn irritating kid” in my head lol. I am still nice/playful and what not but I’ve come to realize that my time span being around other kids is very short compared to being around my nephew lol.