It sounds like depression, of which I have some experience with. If you need to see someone to make that diagnosis, do so.
I’ve learned that the first thing to do is accept that this is how you feel. It surprised me how much judgement I put on myself for having the feelings I had, but doing that doesn’t help. That makes things worse. So accept that they are what they are. That makes it easier to separate yourself from your feelings (because you are not your feelings!), which in turn will help enable you to make the effort to help yourself.
They don’t have to be big changes, even little ones like moving your body in some form of vigorous exercise for 20 minutes every day. I have a jump rope and I’m lucky enough to live in place with a sizable living room that I can jump in. It helps to move your body. Get at least 15 minutes of sunshine. Eat properly. Sleep properly. Find some way to help someone else, even if it’s only once a week. Be grateful for something everyday, no matter how small. It doesn’t have to be to some old man in the sky, just be grateful in general.
Sounds corny, right? But body and mind work together and you can’t neglect your body without repercussions in the way your brain works and vice versa. A lot of times we feel depressed because we feel disconnected. And if we’re grateful for what we do have and use it to the best of our ability at any given time, it helps a LOT.
A lot of times we feel depressed and disconnected because our thoughts are steering us in the wrong direction, and we mistakenly believe we are our thoughts. We are not. I’ve recommended it before and I will again: Feeling Good by David Burns breaks it down very simply and gives you some other tools that can help you help yourself. Once you are free from the spiral of nasty thoughts, the things that you feel deeply and passionately about will become clearer. The best are ones that connect you to people in positive ways. You’ll know it when it happens.
And don’t beat yourself up if things aren’t happening as quickly as you’d like. It takes time to feel like you’re in a place where depression isn’t pressing down on the healthier parts of yourself; just keep doing the work, examine your thoughts objectively, examine your behavior towards yourself and others objectively and keep going from there. I’m working my way out of a deep funk right now because I pushed away from doing this hard work earlier in my life and I’ve paid dearly for it. Being here to be able to answer questions like this helps a lot.
Good luck to you!