@Raspberryfloof I actually have a really easy fix for your problem.
Post positive things.
Maybe not positive feelings you have, or positive things in Your life. Those are thin on the ground.
Go thru the Fediverse. Thru your timeline.
Find positive, genuine, kind things to say and say them, without shame or disguise.
See how many kindnesses you can deliver in a day. Get good at crafting them, and find who they belong to.
And do it every day.