I hate feeling like the “girl best friend “

My best friend is dating my old boy best friend but we literally haven’t talked in years we only started to talk again bc she contacted us again but even then it’s a couple group chat with my bf in it as well and even when we talk it’s about how much we love her or how much I love my bf hack sometimes it’s even about how he thinks my bf is hot and is flirting with him as a joke but nobody around us knows they are dating so of course my great great grandma and also her grandma said stuff how close me and him were and how we should date and she started going quiet and looking uncomfortable and I felt so bad I also have a feeling she sometimes thinks about that and I feel so bad