Assalaamu alaikum Mikhail,
(smile) Welcome to this Forum. I hope you continue to participate with us. Each voice is a Gift, because each person has their own, unique perspective, that can help others to think and grow.
(smile) It's not easy being 15 at the best of times, and it sounds like you've got a lot on your plate. Dan's idea is not a bad one: can you look around and find out what ressources there are that you can access? Unfortunately, psychologists cost a fortune, (smile) and being 15, you perhaps don't have a fortune... I don't know where in the world you are writing from, but in Canada, there are special Kids Help lines (yes, I know, you're not a kid anymore, really, but they help teens, too. (smile) In fact, I suspect that most of the people who phone these lines are teens). There are also suicide prevention lines. Even if you're not feeling on the edge of suicide right now, I suspect they could direct you towards local resources. You could also try approaching any sympathetic teachers, or school counsellors, or doctors or nurses... Are any of the parents of your friends the sort you could talk with? Do you have any neighbours you could confide in?
I know you feel very alone, and feel like everyone else is happy, and only you are suffering. But I assure you that there are others who have problems, too. And problems worse than your own, perhaps. Does that mean your problems are not serious? No, of course they are serious. But if you can spare some sympathy for others in suffering, you may be surprised to find yourself feeling a little better.
You know, whatever anyone tells you about your relationship with God, at the end of the day, its something just between you and God. (smile) And no one can take this away from you. If you focus on Allah alone, and try to be the best that you can be, you'll be going down the right Path. (smile) You'll make mistakes, of course. (sigh) Maybe some big ones, even. But if you keep your eye on the goal of seeking closeness to God, you'll be surprised what you can get through and accomplish. (smile) And Allah is so Loving and Warm and Forgiving.
(smile) Some people think that if they are to rely on Allah alone, that this means they must never seek help from people around them. But this is a mistake. It is often through other people that Allah Sends His Help. (gently) And if you are crying silently every day, please look for His Help.
(smile) And there is help beyond people, too. You can connect with animals, perhaps. You can walk through the woods. You can make yourself something tasty to eat. Read a good book. Write a poem or a story to express your feelings.
(smile) And you can help others. Volunteer at a food bank. Chat with an elderly person in a park, in a mall. Raise money for a cause. Smile at a baby. Share a treat with a friend.
(smile) You don't have to do all or any of these things I've mentioned. They are just ideas. What I am trying to say is that while you may feel helpless right now, you are less helpless than you think you are. You are able to reach out to others (I didn't say it was easy... but you have the capacity to communicate, right?)... so see to whom you can reach out... and do it. You are also able to give to others. You know, even just your friendly smile could make another person's day. That's a pretty powerful thing, you know. You are also able to give to yourself, whether it be a treat or a kind thought... (smile) Yes! Think of your good points. You got good grades? Ma sha Allah! Good for you! (smile) And you can call out and lean on Allah, always. He won't always Give you what you think you need... but He will Send you some form of aid... you just have to open your heart to see it, sometimes. (smile) And He always Listens.
(gently) I'm afraid I don't know all the particulars of your situation, so my advice is only of a general sort. But one thing I can tell you: it is a strong person who can admit to weakness and seek help. (gently) Be strong, my dear. You've reached out to us on this Forum... now try to reach out onto the world around you. (smile) And if you want to continue to participate with us on this Board... then please do.
May Allah, the Loving, the Kind, Enfold you in His Care.