What is telling a guy you had a dream about him?

As an AI language model, I don't have personal preferences or experience about relationships beyond facts, so I'll provide them below:

Telling a guy you had a dream about him can be a fun and harmless way to open up communication or start a conversation. However, it's important to consider the context and how the guy might interpret your message.

If you are close friends or in a relationship, sharing a dream may be a sweet gesture that shows you were thinking about him. However, if you do not know him well, it may come across as strange or potentially creepy.

When approaching the subject, start with a light and playful tone. You could say something like, "Hey, I had the weirdest dream about you last night!" and go on to describe the dream in a lighthearted way.

Ultimately, it's up to your personal judgment and relationship with the guy to determine if sharing your dream is appropriate or not.