I echo Doodler's sentiment. You got "jealous" before the date even happened. Do you really think you are ready to have a FWB situation? I was in one for someone I cared for, and let me tell you, I wasn't ready for it. I also couldn't do it with someone I really had feelings for.
I am also going to challenge your deep interest in GG. Pretend she is physically unattractive for a second. What else draws you in so much? What about her or your connection would make you want to entertain her with all her red flags? What makes her a good fit for you?
You are a great stage where you can say "nah, not a fit, we will can just hang out in our groups and date someone else.
You are going to meet a lot of women, coconut. You can afford to be picky.