I've been through the same cycle for many years (I can even say decades). My recommendation is to seek help from a psychiatrist. You probably have generalized anxiety disorder and it often goes hand in hand with depression. A psychiatrist will be able to diagnose those and give you medication if you need it. She could also recommend therapy, but you need to be diagnosed first.

Unfortunately, it is very difficult to find a good mental health professional. You'll have to try many before finding a good one. Plus you will procrastinate of course. But you need to persist and make this task your priority. I know the pain you're going through, and nothing should be more important than ending the suffering right now. Once you get better you'll wish you had sought help sooner.

From my research and my experience, there are two effective treatments for anxiety and depression backed by scientific evidence: antidepressants and Cognitive Behavioral Therapy.

The other comments are well intentionned but most of them are basically asking you to change your mindset and just do it. Obviously, if it was that easy you would have done it already. Anxiety and depression don't allow you to think clearly, that's why it is extremely difficult to get out of it on your own.