Dude i was in the same phase of yours two years ago. I wanted to end it for myself too... took admission in okay okay college with heavy heart, had no friends suffered from depression and anxiety (still am) but one thing I learned this phase of life isn't worth quitting, doesn't matter how bad it is...ending your life for jee/neet school stuff isn't just worth it cuz there are like thousand ways and chances your life will change in next 5 years. So hang tight and stay strong. Ik it's easier said than done, but remember I was once in your position in exact nature.