You need to break the habit loop of this emotion by breaking the habit loop of thought. Priming the mind in the morning really helps me fight my depression daily. Unfortunately for me it's chronic since I was a little kid, but it doesn't mean I will let it control my life. Here's a free resource. https://getmotivateapp.com
Another thing that really helps is paying attention to others and giving. When you do that you increase dopamine levels and take your attention off of yourself as you enter the world of another person. This doesn't have to be anything like volunteering once a week, but just small acts of kindness that all compound into your life. Start with your family and friends and then you will gain awareness for everyone else.
It's a bit weird when I tell people I use "giving to others" to deal with depression, but if you combine that with priming your mind, you can get it through it. You can.