I think im in love with my best friend...

hi so im not really sure which thread to put this under so ive just picked here to possibly avoid any negative comments but here goes...

so im bi and ive got this wonderful best friend whos pan and she means the absolute world to me I honestly couldnt imagine my life without her.

the thing is, I think im growing feelings for her which somewhat complicates things. and its not as simple as that, previously she was in a relationship with a very close friend of hers and now they dont even speak to eachother they hate eachother so much. which puts me off entirely because I would not at all want to loose the friendship I have with her.

Additionally, she is in this on and off relationship with this person who just does not appreciate her at all and it makes me so mad. at the moment theyre kinda in the process of getting back together but not quite.

also, we have admitted to eachother that we USED to have feelings for

eachother so maybe that could be rekindled?

I honestly have noone to talk to about this since its my best friend and I cant exactly ask advice

so im wondering, do I risk it all and tell her how I feel or do I stay quiet and reducde the ridk of our friendship crashing and burning :((