I'm reluctant to say "things will get better" because it used to really annoy me at times when I was feeling really bad, but I just wanted to share my experience because you sound in a really similar position to me four years ago. I was at the end of a relationship, had to move quickly and couldn't afford it, I just managed to pay a rental deposit on the last bit of my credit card but was in so much debt I couldn't afford my rent. I was being bullied by my boss and thought I'd never find anything better. All my friends were getting married and having kids and doing things and I just felt like a loser next to them all. I was so down I thought I must be the worst person to spend time with and was waiting for my mates to ditch me. I was self harming, drinking, doing too many drugs, not eating and couldn't get through a day at work without crying in the loos at work or on the bus. Every time I woke up in the morning I was furious I was still around, I felt absolutely worthless and didn't want to be around. I still had "fun" but I'd go home and just feel completely empty.
That was four years ago and I'm not saying I'm cured or always happy but lots of things have worked themselves out. I wouldn't have believed anyone if they'd told me... I probably wouldn't have believed them last year either, but looking back life has got very gradually better and if it can for me then I think the same can happen for you. I eventually tried medication last year after avoiding it and although it hasn't solved everything it definitely took the edge off my negative thoughts.
You're definitely not a burden at all, there will be days to look forward to in the future and there's every chance things will work themselves out for the better. I really feel for you and hope you'll be OK