this is a slang used by the two latest generation- GenZ and Gen alpha, in texts.
It means 'I know' which is a comment for telling the other person that the speaker understands about what the other person said.

Linda: I heard Millie is going to shift.
Jeff: IK.

IK by yellowbbb March 27, 2024

Ik houd van je

It means "I love you" in Dutch.

When you say "ik houd van je" to someone. you are telling them you love them.

Ik houd van je by Liz-beth July 1, 2007