Try to keep your friendships strong! If you do not have a group of people to rely on, try getting an emotional support animal. There are many people that care about you including your school's staff, you are loved.
Explore different activities such as arts and crafts. There are many activities you can participate in!
We are all good at something, whether it may be drawing, making music, dancing, crafting, mathematics, doing tricks.... and a million more to name! Explore what you can contribute to the world.
Going outside (with parental/guardian permission) is always a great way to battle against these feelings of isolation, try taking a photo of the sunset and admire the planet!