For you to remain positive in such difficult scenarios, I'm advising you to think why you should continue to live, why you are doing things in the first place. Think about your dreams, dreams you are seeing to achieve that wouldn't be possible if you stop believing on yourself. You can also think of your family, they're the one that will never be away from you no matter what. So that's it, just try doing that things and that might probably help you to stay positive in your life.