I feel so depressed help?

okay so I've been feeli'n very depressed lately, because my mom has a back-bone problem known as "slip-disk" this means that she can't bend or either carry anythng heavy anymore.which in other word means that I have to do lots of house works (that includes cooking)! on the other hand my whole family is going through a huge financial problem right now. Im just a high schooler (freshmen) and I don't want to get stuck in the kitchen for 24 hours! my board and final exam coming up soon,my grades are getting lower (cause Im not in the mood anymore) my school is going to have a graduation ceromoney for all the freshmen for entering in high school, they going to have party,sing,dance,chat with friends and have fun,and seeing them have happy moments in their lives makes me feel and sad after sad! I don't have a friend either with whom cant talk this out with.Im soo damn depressed I don't know if I'll ever get my happiness back again,can't smile anymore,lost my cheer-fulness...please don't tell me to talk to a guidence counselor or a doctor or anyone..and please don't make me feel more sad and depressed with rude comments or advise please.