I doubt she's jealous, coz like you said, this change started when you started dating your bf. Idk her, so I can't say. But if you've confided in her about your bf what you have divulged here, she might be mad at you or even dissapointed. Sounds idiotic doesn't it? But highly possible. I had a friend, who now hardly has friends, her own sisters avoid her. All bcoz she confides in them about her crap bf, and honestly the guys a loser. Shadey illegal dealings, verbal, financial and emotional abuse, plus he's a womaniser. Why have we all turned our backs on her? Coz despite her incessant crying and ranting, rapid weight loss from lack of appetite, lack of sleep (that WE saw her thru, N0T him) she still idolizes him, and worships the ground he walks on, won't leave him and bites off anybody's head that dare point out his flaws. Says she just can't be alone. We, found that a VERRY bitter and sad pill to swallow, that she would sacrifice herself like that for a jerk. Ugh. So, I'm not saying your bf is like this guy, but he might be the reason your friend has changed, maybe she thinks you deserve better. Btw that is me being completely presumptious about you telling her everything. If that's not the nature of your friendship, then I'm as baffled as you are. Hope you guys figure it out. XOXO