A crush is a strong, temporary romantic attraction to someone. Crush is a noun which is almost always used with the verbs have or have got:

I have a crush on our new teacher. OR I’ve got a crush on our new teacher.

Some other notes:

  • Crush is usually used in a dating context (not marriage)
  • Crush is often used for a relationship that is not mutual (only 1 person likes the other, not both) [My friend has a crush on her co-worker, but he’s not interested in her.]
  • A crush does not have to be practical. For example, many young people have crushes on celebrities who are much too old for them (though Tom Cruise and Nicholas Cage would disagree).