Your mind will be constantly imagining scenarios where the person you're interested in is in a relationship with you and that they're both happy.
Fantasy relationships cause physical symptoms like anxiety when waiting for calls and texts. Before chatting to them, you may be frightened and sweat.
When you fantasize about the person you want, you're the hero who saves him from peril, and he falls in love with you instantly.
In a fantasy relationship, attraction is strong. You can't avoid him. You can get closer by visiting areas he frequents.
You believe that they are "The One" for you and that you and they are meant to be together. You can't help but fall in love with them.
One of the most obvious indicators that you are in a fantasy relationship is when you idealize your partner to the point where they can do no wrong in your view.
Jealousy plays an enormous role in a fantasy relationship. You will experience intense jealousy when other individuals find them attractive.