Am I gay or insecure (repost)

okay so basically I have a best friend of 8 years and we are extremely close and very emotionally dependent on each other, probably not the healthiest thing in the world but its whatever
Recently she has had this friend and they have been lowkey crushing on each other
For reasons that I don’t understand, this INFURIATES me to unfathomable levels
Like seeing them flirt and match pfps and when she calls her and kind of ignores me (not on purpose really) for the night
It makes me extremely upset like that SHOULD BE ME and it WAS me at a point bruh
I’m not sure if I am just anxious about being replaced or if Im down low for my best friend. We are kinda queerplatonic if I had to put a word for it (she agrees) I just struggle to understand what are romantic feelings and what aren’t
AM I GAY OR JUST EXTREMELY INSECURE AND PATHETIC AND SHOULD DIE