How can I be more depressed than I already am..?

I’m only 18, that’s about as much as I can say. I have been diagnosed with depression before when I was 11. Me and my boyfriend have been dating for 5 years. I moved away and out of my parents house a couple months ago, but I moved back because my boyfriend convinced me I could make more money back home. So I moved back , about a month after he lost his job.. so now we both don’t have jobs... I have a cat.. she’s about 2 but recently got really sick... she’s my rock... and I don’t know.. my family is going through so much right now as well and I want to crawl into a hole... I’ve been gaining weight and I got kicked out of school for failure to pay. I feel useless ... unworthy.. and mad .. mad at everyone and everything .. I cannot keep living like this.. I don’t know how much I could take.. I cry myself to sleep every night.. I haven’t gone back to cutting but it’s all I think about ... cutting and food .. and it’s a cycle .. I wake up cry.. eat.. puke.. cry.. do nothing ... work out, eat more , puke again.. cry and sleep. I don’t know why I’m posting this.. maybe as a last chance thing .. or maybe just to get it off my chest .. I am just constantly sad .. worse than I was. I can’t keep doing this