It is completely exhausting to think for others, feel for them, and predict their reactions. It is also quite useless: to live the life of others instead of doing something beautiful of your own.
It is boring and bleak to live in a world where your cheerfulness depends on how well you adjust to someone else's view of you. It is all right to end relationships and quit jobs that do not bring you value anymore or jobs that you cannot devote yourself to anymore either. It's not because it will be more exciting or interesting with other people or at another place, it's simply because here, at this particular place, it definitely won't be exciting or interesting anymore.