Honestly I would stop doing things with her. She is cake eating. She has friend zoned you. Thats my opinion.
The more you stay around her, the harder it is to detach. So the longer you keep doing things with her and acting like her BFF, the longer you will stay hurt. You will notice that you are detaching correctly because you will feel better emotionally.
Remember, detaching is for your emotional well being. If your WW starts to ask why you are detaching, just tell her you are focusing on yourself. She will notice and she will either fill the void left with hate or with temp checks.
M:16 T:21 H(me) 38 WW: 38 S11 D16 D19 Red Flags of A: March 2018 ILYBNILWY: August 4, 2018 Moved out of MBR: September 24, 2018 BD/Confirmation of A: October 31, 2018 D Filed: March 27, 2019