My ex-girlfriend and I recently split-up. She asked for space, but when I give that to her, she keeps finding things to message me about on Facebook. Sometimes they are pleasant things, sometimes they are not so nice. I don't understand?

Welcome to the wonderful world of women. You'll NEVER figure them out.

Sometimes people have a hard time knowing how to be in break ups. YOU decide what you want in this situation and YOU adhere to that boundary.  Don't let her confusion rub off on you. If her behavior is confusing you, then you need to step back and evaluate where you stand. How can you make boundaries and figure out your own stuff if you're in contact with her?

Show her what "giving space" to you means.

Block her.

Don't let her manipulate you and be in control of this. Everything has two sides to it and she obviously in unable to see how this is affecting you .

Tell her on Facebook that she needs to make up her mind and until  then YOU need space.

Hi there this is natural human nature I think as you want to be with that person but also u don't want it because in relationship sometimes people need space ...its okay if she asks for that but if she still texts you and wants to be friends with you then just tell her clearly that either be with you or just stay away that you can't be friends with the one you love.

From experience, I can say she knows she shouldn't be messaging you, because you need space to get over feelings for each other but she's hurting so much right now and wants a reason to get in contact with you because she misses you. Even if it means being not so nice to you, it's still contact with you.