A person that is a supposed rose is a person that may have anxiety, that's quiet, or is shy; especially in social situations. They may seem to be rude or may come off as an arrogant snob, a thorn on a rose. But they're not. They are a supposed rose.
Man, I used to think she was a jerk, but she's a supposed rose.
An endearing sentence, used when you might not be able to keep the conversation going? I’d like to say it’s when you love someone so much you don’t know what to do with it.
“What am I supposed to do with you, love?”