You are never alone......Jesus Loves You!!
There will always be times that you will feel alone and that nobody cares, but there will always be someone that will be there for you when you need them. You just have to open up to them. If not your peers, your family will always be there to help you through difficult times.
Don't worry about them. If those in your peer group don't care for you, find a new group. There is no need for anyone in this world to feel alone 100% of the time.