I expect my friend to know when I am not ok
What would happen if he doesn't know that you're not okay?
He won't be able to help me when I need help then.
It may be convenient to rely on your friend to help you when you are not feeling well, but this leads to a destructive dependency. Take charge of your life, and don't lean on him.
I get it. I am going to be a lot more responsible and take care of my emotions myself. I won't have to look to others to help me.
While you shouldn't be completely dependent on your friends to support you, there is some expectation that your friends will be there. If you are struggling, it's okay to reach out and ask for help. You can't expect your friends to read your mind, though, and know how you feel without you telling them.