Keep persuing. You have no history with her friend. It shouldnt be an issue and the friend only has a stupid crush on you. Its not like shes in love. Shell get over it. Lifes too short.
My cuz has a similar issue. She has a history with this guy. Lets call him bob. Her and bob have been bffs for years, both have feelings and have slept together in the past. Anyway my cuz become best friends with this girl lee and lee really likes bob now so cuz wont go there. I think shes a fool tbh
"Don't ask a question if you can't handle the answer".