Do you ever feel foolish for getting irritated over trivial things?

Seems immature. He needs to 'grow up', get a life. Tell him that and then ignore him. Don't get upset, but don't suppress your urge to complain. Just use these quick short retorts and then ignore his constant nagging for attention and he will eventually stop, but you have to be consistent and stick to your stance of dis interested bored snide comments.