@Misty9
What do you absolutely love to do? What takes you down a path of complete focus, where you get so much into it that you can't think of anything else while you're doing it, and you come out the other side thinking 'Wow, I'm so glad I spent my time doing that, it was amazing!'
I'm intrigued - do other people have a thing like this?
Ugh I wrote a post and pressed preview instead of post
@Misty9 I really relate to your post and the other PP who said they have experienced that crushing loneliness and I've been through that horrible existential crisis of being Alone.
I'm really sorry you're experiencing this, it's really hard going and it feels so awful, crushing is the best way to describe it because it almost has a physical weight doesn't it? The worst does pass and if it helps at all there are people in the world that care about you, even lovely strangers on MN who have been a huge comfort to me at times.
I really loved my old job, I could still talk about it for hours but it wasn't my "thing".
I think my thing might be art, which is a surprise having never been arty before. I'm not very good yet but I feel happy when I complete something because that is also an achievement for me.
I'm trying to adopt a more chilled out attitude to not being able to draw perfectly straight away, making mistakes etc and I feel like it's helping me with some of my larger issues in a weird way. Like for example I'm not big on trying things for fear of failure, so starting a drawing can sometimes be a massive hurdle ha ha! I am really enjoying the end results though and the feeling I get from having made something.
Take the opportunity where you can to lean into any urge to try something you feel, you say you might do more with your singing? Definitely do! Sing your heart out, join a choir, start a band! 
Fancy a go at windsailing? Do it! See some nice pencils in a shop, buy them and draw something, or steal your kids art supplies and just have fun with paint! Write poetry or a novel, join a fine dining club, take up something obscure just because it tweaked an interest.
If it doesn't absorb your mind and leave you feeling really content try something else next time, you might be surprised what your "thing" turns out to be.
@TheFoundations great posts, very well put, insightful and really helpful.