1) She's not happy
2) She knows you are checking FB so she's trying to make you jealous
3) Why are you doing this to yourself?
That last one was not like the others
Stay off social media and analyzing. It will only hurt you. It tells a FAKE story. Since you aren't talking to her directly you are basing things off the pictures you see. No one puts the worst parts of themselves on display on FB. You are seeing what SHE wants to project... .doesn't mean it's real.
My ex had very specific patterns when she was with me. When she would dump me up would go a pic of a raging tiger or lion. They were aggressive, angry animal pics. Then would go up a pic of an activity she had done in the past with an ex, like a vacation pic. There was a distinct pattern in her FB pic rotation.
With my replacement she has had the same profile pic up for over a year. It's a pic of her and my replacement beaming.
There is no pattern as with me. Now does that mean everything is "peachy"? No. After awhile they have to change tactics or they stop working. When people are "on to them" they need to change things up.
If your ex was an ahole she's still one. Trust me.
Try to block or stop looking at FB. Truly, for your own good. It does no good.