I am having problems with the word "втрескался", the context being -

Сказ о том как Ванька дурачок втрескался в распрекрасную заморскую принцессу с грустными очами, и как полез ее спасать.

  • Hi and welcome to Russian SE! To make this question on-topic some prior research effort supposed to be clearly indicated - like what versions you have on your mind so far and why you still not satisfied with them.
    – shabunc
    Jun 3 '19 at 19:58

I think the most exact translation would be, amusingly, "had a crush on" that princess. That is, sudden romantic feelings.

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