Should i unfriend my mom on Facebook?

[kommando]

Facebook security options constantly fail or have loopholes all over.
I depend on them and there are certain times like right now where I have to wait until I go home to use a desktop just to change security settings of who can see what I post otherwise it constantly reverts.

Also I have had people who I've added and put directly on a can't see posts setting and they see/share/comment on my pictures every time.

But to answer your question go to your moms page, click on friend, click to see more on the list and hit RESTRICT.
She will still be your friend, still see your profile but it'll be blank. No access to anything but not completely unfriended/blocked.
That's the only option that works consistently.