Hey... I am going to be really simplistic about this...(and I am known for that from time to time)

Firstly.. you are not in actual fact, to blame..

Do what you can... if it still isn't good enough..then that's not your fault.. If she really wants to be your friend..and I mean friend (pardon my insensitivities...assuming you don't mean girlfriend) then she will be there.. I know some ppl run a mile from me when I bare my teeth.. others ...just say.. "oh that's just Av.."

You are who you are...love it. Embrace it... the right person/friend will love you regardless...
Disclaimer: Easier said than done.. the author of this actual post is still in training and she writes this in an attempt that one day she will take her own advice..