You really need to find a way to pull yourself together. All those things she told you were the way she felt AT THAT TIME. Now she feels different. Tomorrow she may feel some other way.
Get off the rollercoaster.
DETACH.
You notice couples because you're looking for couples.
Nothing wrong with going surfing alone.
Embrace life.
Everybody hurts. It's part of life. Don't miss the good stuff.