This probably seems silly, because I am sure that she will accept me. The problem is when I went to tell her I completely locked up and began having an anxiety attack. I feel so foolish and silly. I still have a lot of self identifying to do, but I want her to know for support. I am going to try again during our bike ride we are going on later tonight. Edit #1: My first attempt was at the mall and we were about 45minutes away from home and in the process I literally felt like I was going to pass out. I have never felt that way before and it scared me.
How's about writing a note and passing her it before your bike ride tell her to open it when you next stop (maybe arrange a stop after about 1 mile) Maybe you could just put something like "I want to tell you but I'm struggling to tell you I'm gay (or not straight however you want to put it) I want to say it loud to you but froze up" That way you can't get out of it and even if you don't have a stop she will still get to read it