what concerns me the most after reading that post is the fact that your cat has a dirty litterbox.

is their someone who can come in and help you look after the cat? ( a naybor, a friend, etc). the cat needs a lot of care, and a lot of things done for him- is the cat being fed on a daily bases?, does the cat have water?. is the cat free to go out when it likes?

I don't mean to preach about treatment of animals (that's not my intention), you're obviously struggling a lot yourself, and I'm just worried by the fact that you have a cat, and it's maybe not getting the attention it needs

cat aside, I do agree with making small goals- they can be really little.. today, I'm going to sit in my living room with the window open for 10 minits (something as simple as that), then move on to bigger stuff- maybe at first, it can be one day a week, you set aside for yourself.. just one day when you're like right okay, I'm going to shower, I'm going to clean my room, I'm going to try and cook something for dinner... just one day

good luck