How do I do get her back? is it even possible?

well you don't sound desperate, you sound like someone who really has found who they've been looking for. I'm 16 also and i know how it feels to loose something that means the world to you. sometimes it takes for you to loose something to show you how you really felt about them. This girl is young, she obviously has a lot to learn and wants a friend to fall back on a have a shoulder to cry on. It sounds like she obviously still loves you but is scared that if she gets back with you it'll only end in tears and she'll loose someone she can really connect with which is im sure how you're feeling aswell. I'm sort of in the same situation, I really like my best boy friend but im scared that it'll go down the toilet if i make a move. i suppose life's full of risks and get what you really want you have to take them. What i would suggest is try to get her to tell you exactly how she feels about this other guy, if she really is happy you should let her be with him, if you feel she isnt then let her know how you feel. if she really cares for you then she'llunderstand but its your decison. hope i helped, x