What's wrong w/ me? Life is so boring.?

Lately, my life has been so boring. A few months ago, it was amazing. Fun, lively and full of friends/hangouts/talk or chatting. Now, it's all boring. Like, I don't know, I've been sitting around my house alot. School has been bringing me down, I've been getting bad grades this week in my A.P. cles on my tests, and I've been slacking off lately. Also, my friends and I are like not talkative. Nobody calls me or emails/IMs me these past weeks. I feel kind of lonely and a little bit depress. :[ So yeah, school and social life is bringing me down. There's nothing I can do about it, I can't just go outside or hang with my friends easily, my strict parents won't let me. Idk, I feel sad as well. Nothing exciting is happening, life is just boring. Anything wrong w/ me? Please no rude response, I'm really out of it. =/