What does it mean if you scream someone's name in your sleep and then giggle?

This could mean two things. If they are from your gender, this means that you to are great friends and will grow closer. If they are opposite your gender, then this means you will fall in love with them or you will have a crush on them. This is normal for 13-19 year olds and might even happen often but most of the time, you will not notice.