Being: The state or quality of being being; existence is a tricky word, in every language I know. We use it as if it were cheap, inconsequential, but that misuse causes mischief.
When you say ‘I am depressed’ instead of ‘I feel depressed’, without knowing that there is a difference, you, unwittingly, practice self-definition.
You can feel a lot of things. Feelings and emotions have a normal tendency, that when not resisted, they move. They change. They morph from one feeling to another.