Yup, it can be a depressing site to be at. You know what, I was EXACTLY in the same situation like you 3 years back. I had a MAJOR depressive episode coz my ex left. I actually had some suicidal thoughts but never really act them out.

My ex was right, I loved myself too much. Haha. So chill, just deactivate it.
Go out get some sunlight, talk a walk. If you can afford, get a puppy. Animals are therapeutic. Am partially recovered from my depression like 70%. Yeah sad part, I got no real friends. Oh well, c'est la vie. Be well & prosper.