Hey there,
I'm sorry to hear about your problems. I can associate with that helpless feeling, where you try everything but nothing seems to change. There's just so much you don't have control of. Here's a couple of things I've been trying. First off, don't give up. You're trying hard to change yourself for better, and you have to believe it'll turn out for the better. Second, try and set a small goal for the day. I you don't accomplish it, don't sweat it, there'll be another day. Finally, no one is perfect. Don't be afraid to lean on your friends. You're friends because you care about each other.