Losing Interest in Everything, Feeling Hopeless

I think what you're going through is anhedonia, or disinterest in activities you once found enjoyable. I'm not sure how to properly help you, but I think still engaging with those activities would help rekindle the interest. Also learning about it would be beneficial.

A friend started an app called Shmoody - and I like it so far

Well if you figure out what works let me know. I've been struggling for years and still haven't got it right