I've decided Facebook is too toxic for me... From comparing myself/life to others, to ruminating over the fact that I have no close friends and rarely any engagement... It's enough to send me into a loop of intrusive thoughts, which ultimately lead to thoughts like, "nobody cares about me. nobody notices me". 
Seeing as how I have quiet BPD you don't realize how much this kind of thing piles up in your brain after a while, making you more likely to split on a person. Since I've deactivated Facebook I haven't split on my boyfriend really much at all. I'm proud of myself.