My teenager...ugh!!!! (lol)

My daughter is now officially in the youth group at our church. I am ok with it now but let me tell you that I really had a hard time with the idea that I now have a "teenager" She is only 12 but will be 13 next month. Why did I have such a hard time you ask? I am not sure, I think a lot of it has to do with letting her go....agonizing to the heart!!! Also now that I have a teenager I am officially old!!! Accordng to my daughter, I know nothing . We have always been extremely close and I feel her pullling away from me and it breaks my heart. Also she is starting to think that she knows everything and that we don't have a clue to how she feels, come on now, I was a teenager not so long ago so of course I know how she feels and what she is going through. I never thought of myself as old, as she tends to think of me and her dad, after all I am only 35 but I guess to a little girl (umm young lady) that feels ancient!! I do remember 13. That was a really hard age for me and I am trying to be sympathic...My mother must have been a saint!! (lol) I remember thinking that she didn't know anything and that I knew everything, I remember the mouthyiness of myself, however I didn't say a whole lot around my mom because I knew that I would have been in big trouble if I did. I remember but now that I am the mother??? It is not so easy to take. I love my little girl (umm..young lady) with all my heart but I am really tired of the disrespect that I receive from her. I know I never did that to my mom...maybe I should just relax and realize that it is time for her to grow up and let go of the apron strings a little......notice that I say a little.....not ready to let her go... I also realize that she is the best kid around others....at school, at school and church, ect so I must be doing something right...right?? She is wanting a cell phone for Christmas and I am torn....what do you all think? She is a straight A student and basically a pretty darn good kid so I think that she would take the responsibility seriously....I just don't know. I would covet your comments and of course all the prayers that I could get....