Are we living in a simulation?

Yep.  Life is just one giant game of "The Sims".  I visualize a room full of people in heaven, all swarmed around a large computer monitor.  Everyone's laughing their @$$es off, and God is going, "If you think THAT'S funny, watch what this guy does when I do THIS!!!!!"

It doesnt matter either way.The "simulation" is advanced enough to be indistiguishable from "reality".

We are not living in a simulation.

Some people theorize that idea but I don't think it's true. I have other ideas like that within a black hole is what we would call a universe. So our universe is in a black hole and black holes in our universe have their own universes and so on and so forth. They scale up and down which means size is relative to the universe that you live in. It's just a theory I started to subscribe to when I read about it a while back. I think it's just as valid as any other theory about the origins of our universe.

Theres no way to prove one way or the other

If that were the case, it's a pretty shitty simulation. 

no this is real life dear..

No, I don't think we are hun.

Es day blah dee doo.