I dreamed that my boyfriend had a pair of red peonies tattooed on his back.

Possibility 1: You pay special attention to your man's cheapness, and always fantasize about what he is doing and who he is with when he is free.

Possibility 2: There is a person around you who can attract your attention or arouse your association (that is, someone you can think of from time to time, and you have a good impression on him), so you will occasionally fantasize about what would happen if you were with him:

Possibility 3: You don't care much about the current man's cheapness and want to find the next target.