You always have a way to motivate yourself.
As much as you motivate others, you have the ability to do it for yourself too. You can save yourself too. And you are not obligated to save others. You can try but it is not up to you whether they get out of it or not. I know some days you are not strong enough to fight the negativity and the insecurities you face. But you will eventually find a way out of it.
I earnestly hope that some day all these will become something you are used to and you don’t have to fight the same battles anymore. In future, you’ll be fighting new battles and come out strong. If anything, I know you are capable of doing it.