At what level do you reach true emotional maturity ?

Not so sure about that.

Expectations are bound to happen every now and then. It is our nature to be inconsistent in how we approach the world, because we are inconsistent beings.

I would say people are emotionally mature when they learn to manage their feelings in accordance of what is best for them and other people; they start letting go of what harms them and others, have good sense of personal accountability, and better understanding of the necessary circumstances which require sacrifice..etc.

That's a big part of it. There's a lot within that and many ways to get there. But I agree, once you realize you don't have to deal with other people's shit and take better care of your own, you're on your way.

In a way... you don't expect as much as you did... you become more independent, you tend to mind your own business more, you ask for help when you need it, but you accept graciously if someone can't help you.

I think when you and the world around you are in sync. Whether that means fully comfortable alone or you have people around you who you fit perfectly in each other's lives

I think emotional maturity is accepting and caring about your actions and how it affect others.

When your partner gets high or drunk-wasted, and instead of being mad at them, you ask for more money.

When you stop caring about petty things, when you have focus, and have mental stability most of the time.

Varies obviously. Me was late 30s before I got close and still working on it.

It's when you see things as they are and are realistic about actual reality

When you can stop long enough to smell the flowers.

I’d definitely say for my case when I graduated college. Life got real real fast

When You think of others before yourself.