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Okay, this is where I give the disclaimer that an LPC isn't qualified to give an official diagnosis, but it sounds to me like you have depression, probably triggered by your dad dying. I'm going to guess they didn't have a rigorous mental healthcare system up in space and probably didn't take that kind of thing seriously, but there's a lot of science on it showing how badly it can affect people and how hard it is to beat if you don't have help. The good thing is, if you do have help it's one of the most easily treatable mental illnesses there is.
I can give you a medical referral to talk to one of the actual doctors, probably Jemma Simmons or Leslie Thompkins. They'd be able to do a better evaluation and decide with you what kind of treatment would be best out of lifestyle changes, specific talk therapies like CBT, and medication. I know it kind of sounds like a lot, but really the scariest part is getting started and this is exactly the kind of thing doctors are there for. We've got plenty of resources here, so it's not going to be a waste or anything to use some of them trying to help you feel better.