i have been feeling so down for the past 3 weeks

i am 18 years old

my dog just recently had an eye operation that cost my family $1200..he also has a liver problem that needs evryday medication..since his surgery, i have been crying for almost evry night and only getting 2 or 3 hours of sleep..i wud sleep at 5am wake up at 7am thinking about my mom's financial and health problems and her relationship with her live in bf, my poor grades in uni (i used to get academic awards in highschool and skipped senior year and was able to go straight to college)

i dont have the energy to do normal things like take a shower, brush my hair..brush my teeth..

i just went online today coz i feel like i needed someone to talk to..i dont want to talk with friends or family or with my bf..they wont understand and they are the reasons of my problems anyway

i havent been out of the house for 3 weeks except to go to the vet

relationship with bf atm not so good
usually my dog will cheer me up, but even him has his own health problems that sometimes i wish to get him euthanised coz i feel like this world is so horrible he doesnt deserve to suffer
i have a good to a very good relationship with my mom....me, my dog, my uncle, mom, and her bf all live together in a 2 bedroom apartment..
i dont have a job atm, i resigned coz i have been working and studying at the same time since i was 15years old..i was stressed..i thought its only my work and studies that have been stressing me
i feel sad for my mom coz my uncle and mom's bf cant get along...Tom (moms bf) has his own wife and daughter in another country and my uncle is not very happy about the fact that my mom is the mistress..personally i am not either..what can i do..i am just the daughter she will say..

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