Both refer to the crazy love that you sometimes feel for someone. The feelings that you have for this individual are usually very strong, but they do not last for a long time; they are temporary. A “crush” usually refers to feelings that teenagers have for someone. It has the same meaning as “puppy love”. Teenage girls and boys sometimes have a crush on their teachers. One can have a crush on a person, but not on an object.
*Vignesh’s newest crush is Madhuri Dixit.
Like the word “crush”, “infatuation” can be used to talk about your foolish love for someone. Your feelings for the individual are so strong that at times you are unable to think very clearly. The word is used with mature individuals as well, and unlike the word “crush”, one can be infatuated by things as well. The passion that one has for the person or object is intense, but temporary.
*As he grew older, Vinay developed an infatuation for horse racing.