crush??

When I went to school with my host sister,she asked me if I knew what the meaning of 'crush' was.
At first I thought it was 'crash'.But I was wrong^_^;

Thanks to her,finally I understand the meaning of 'crush'.It means:

a strong feeling of love,that usually doesn't last very long,that young person has for somebody older

(by Oxford ADVANCED LEARNER'S Dictionary)

Oh,I've 'crushed' in my childhood...

And after that when I told to my Japanese friend at the school,she knew it.

I really need as many vocabulary as possible!!