Girls, my female best friend is super possessive?

Kratoszz

Ok so I'll try and be as coherent as possible. We've known each other for around 12 years now since high-school. We weren't really friends, quite the opposite actually at first I made her cry when I first spoke to her (we laugh about it now) Fast forward to the present. We've been getting closer over the past 5-6 years and even closer within the last year.

I don't have a problem with this she is an amazing person and we always have a great time. But it's affecting my dating life. She already has a boyfriend of almost 10 years. She is as I said in the title a little possessive? She says she is ok with me getting a girlfriend and such but everytime I try and get anything started it doesn't last cause the amount of attention that she wants. It's always ended up scaring potential partners off. I can't even call anyone else a best friend or she gets all bent out of shape. She does require a lot of attention which I probably shouldn't be giving her in the first place, I'm not sure.

I know that I can't just continue this way though. I came here seeking advice on how to navigate this situation, and maybe shed some light on why she is this way? How would i go about bringing this up to her?

Girls, my female best friend is super possessive?
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