Take her on a road trip, have some one on one with her remind her of the fun you two had when she was little and tell her you want to enjoy her while you can.  The world is scary and overwhelming and it doesn't make sense to alot of us.  When she sees your strength, without it being pointed out, she will see a strength in herself, even if it takes a while to root. 

You can therapist hop until you find someone that kids relate to, like maybe someone with tattoos or that looks "cool".  There are many of us out there that relate with not relating as a teenager.  She is normal and just needs to be reminded of the strength of your love, just don't let her see it comin'.  She needs surprises.  Good luck.