I’m sorry you’re going through this! I linked to a depression questionnaire (it’s from the American Psychological Association so it’s legit, I’ve filled it out myself in the past!) because to me that’s what it sounds like you’re describing. Hopefully I’m overreacting!
Some things that can help include: socializing more often, keeping a gratitude journal, meditation, physical activity, doing kind things for others.
In the long run, therapy and medication can be great if you have access to them.
And turn off your phone, of course.