I can’t make a diagnosis on the basis of a letter, of course. You would need a face to face evaluation by a licensed therapist for that. But I can tell you that I don’t think you are sociopathic. It’s more likely that you are still working through the normal self-centeredness of adolescence.
The teen years are an important time during which people work on figuring out who they are, who they want to be with, and what they want to do it life. It often is a time of unstable feelings and unstable relationships. It’s not unusual for a teen to look somewhat sociopathic at some point during the process. If you continue to question whether you are in the normal range, I do suggest you talk with a therapist. It’s likely that you will find it reassuring. On the off chance that there is some sociopathy, it will provide a forum for working on it.
I wish you well,