I feel older then everyone else my age

Now i've got friends the same age as me but sometimes they act like little children. I swear to god they start so much unecessary shit and say so much unecessary stuff like im all for a little lighthearted insult here and there but it actually needs to be funny ya cant just blatantly insult me.

Same goes for the rest of my class, everyone is just too much. I feel like everyone is spoiled and they don't have any respect for anything or really appreciate anything.