You can ignore her and simply block her on social media's. And this server isn't a dating sight 
#I need a girlfriend
molten stump
atomic sage
Maybe blocking her can help! Finding friends on game could also help!
small bloom
when I broke up, it took me a while to get used to not having a girlfriend again, do NOT rush anything, especially on getting a romantic partner
hearty burrow
she's only doing that because she feels weak and insecure
her flaunting is a reflection of her feelings of inadequacy, and she's trying to bring you to below her level. she's jealous of you and wants to drag you down to her level. do not take the bait.
block block block and resist the urge to stalk or check in on how she's doing. she's somebody that you used to know.