To dream that you have a crush on somebody is usually a reflection of your real-life attraction to that person.
If you dream that you’re in love with a boy who you don’t like in real life, your dream could be telling you that you are overlooking good qualities in that person that makes him worth crushing on. Or, it could mean that he has some personality trait (like being outgoing or sporty) that you wish you had yourself.
If you dream that one of your friends is kissing or dating your crush, you may not be getting as much as you want out of your love relationship. This dream can also indicate that you are envious of a quality that your friend has - you wish you were more like her in some way.
If you dream of kissing or dating a friend’s crush, your dream is actually about your friend and not the guy. Your friend has certain qualities that you wish you had yourself. Also, you may feel like you’re not as close to this friend as you want to be these days.
To dream about a former crush refers to that particular period in your life and what you were feeling.
If you dream that somebody has a crush on you, then it represent your own positive sense of worthiness and self-esteem.
If you dream of crushing on someone who you’ve never met in real life, your heart is longing for a true love to call your own.... My Dream Interpretation
If you dream that you have a crush on someone then you will come to realize that you are not truly in love, but in like.
If the person you have a crush on is younger or older then you, then this is a sign that you suffer guilt for misleading the innocent party, after you have plumbed the shallow depths of your emotions.... Encyclopedia of Dreams
The action of crushing anything in your dream indicates that you are under tension and/or pressure in regard to making an important decision. Be as independent as possible if you are sure you’re thinking along the right lines, but if you have any serious doubts then get professional advice rather than friendly opinions.... My Dream Interpretation