It sounds like you have a few issues going on. Let's begin with a positive note. According to health guidelines, you are at a healthy weight for your height and age. You appear to be experiencing depressive feelings- negative thoughts, loss of focus, obsession with eating and difficulty forming a close friendship. I suggest you seek the help of a well-trained counselor or therapist. If indeed you are experiencing depression, it will not go away on its own. Get intervention early before your problems escalate.
Wishing you good health,