My friends treat me like some kind of retard

I'm in a trip with some friends and they treat me like some kind of retarded individual.

If we're out and about and I move away to see something the shout at me to not get to far away from them

If I'm looking at stuff and go to grab something to read it or whatever then slap my hand and go "don't touch that"

If it takes me more than 2 seconds to understand were to turn using the sat-nav they snap the phone away from my hands and look at it themselves

If I missed a conversation about some planning stuff because I was doing some else, they go "if only you'd listen" and then snap at me

If I make a joke about something obvious, they turn around and explain to me slowly like you would to a child how such thing works/function while i obviously was just making a joke.

If I'm just standing somewhere doing nothing and one person happens to be walking, and sometimes in busy places it happens that you have to squeeze past, all of a sudden I'm standing in the wrong place and I have the special awareness of a sloth....

When I'm in a rush to get somewhere I'm really excited to see it's "come on mate relax it's an holiday" when they are excited it's "come on mate we're all waiting for you"

I don't know what to think... Time to change friends I think, what's everyone thought?