I fabricate negative scenarios in my head, then get sad
Sometimes when I'm upset, i start creating a scene in my mind.
Sometimes the scenes are unrelated to what i'm upset about initially, but any people involved are always included in this scene.
I only think up these things when I'm alone, such as laying in bed.
For example, my boyfriend goes back on his promise about something I'd been looking forward to. I'll make up a scene where we argue, vivid imagery, dialogue and everything and it ends up making me even sadder, to the point of tears.
It's like I'm making up things to reinforce my feelings, to justify them. Of course, I never take anything that happens in my head seriously. Only in the moment while I'm visualizing, it's like i think it's real and actually get emotional