I have to salute you for putting forth the effort to try to improve your life. Too many in similar situations want change, but they aren’t willing to take any action to bring about that change. You at least try to think positive, hang out with your friends, and try your best in school. I don’t know if you are taking any medication for your depression, but some drugs can actually increase the severity of depression.
As far as depression goes, I’ve been there. Severely depressed, I never thought it would get better, or even actually end. And if anyone had told me that I’d one day not only be happy, but enjoy helping others, I’d say they were absolutely crazy. So I know it does get better. I’m proof of it. There is no magic pill to take, and you won’t get through it in one day, or one week. It is a process. It takes time. But with your desire for change, your willingness to take action, and your persistence to stick with it, it will happen. It does get better. Feel free to message me if you need to talk.