Facebook help!?

[Vanessa]

Hi guys. So i've had a facebook for awhile now, but I have never changed my profile picture. I was aloud to get one at the age of 13 and now i'm 15. My mom is on my friends list. So what I want to do is to change my profile picture but I don't want my mother to see my 'selfies' I take, it's not like it's inappropriate or anything it's just awkward if she see it scrolling down news(she'll probably ask me about it or comment or something which is what I don't want). She goes on everyday (same as me). I'm not aloud to unfriend her(that doesn't matter because I never post anything anyway so she doesn't notice if i'm her friend or not) I was wondering if theres a way I could unfriend her and hide my profile picture from everyone else but friends? Anyone know?