She's meeting up with my boyfriend behind my back!?

[Jordan]

So one of my close frends added my boyfriend on facebook , she has never met him by the way, and she starts to talk to him,webcam him,flirt all that lot , but recently she's been planning on meeting him behind my back on tuesday they have more plans for the week but it is just them and its beginning to irritate me as she calls him "fit" and things like that.I've never really been like this with guys buti guess it is irritating me as they are meeting behind my back and I feel as if I'm paranoid about all this...
Do you think I'm overreacting?
Should I say something to her?
If so what should I say?

[.]

Sounds like she'd have no problem with trying to steal him from you. First off, tell your boyfriend about this and ask him not to entertain her. No meeting, no webcam and to ignore her when she flirts. When you see her, tell her that you want her to back off your bf and to go after someone who's not taken. The important thing is to make sure your bf doesn't do anything she wants.