I closed my Facebook account down awhile back because I often feel stressed by it and feel like I have to compete with other people for attention. When somebody doesn't like and comment on one of my posts or replies but they do somebody else, I get jealous and offended.

While it's true I've met a lot of good people on Facebook some that I am still friends with, it does more harm and good for those of us with mental health issues who can't moderate our time, therefore, I keep only my business account that I use to maintain my web store fan page and deactivated my personal account indefinitely.

As to the OPs question, If she has a lot of friends (several hundred or thousands) and she has a busy career, chances are she missed you. If she doesn't, than I would unfriend her as she likely doesn't care about you.