Learn how to use Object Pronouns.

I - me
You - you
He - him
She - her
It - it
We - us
You - you
They - them

We use the object pronoun when it is the object of the verb or when it goes after a preposition:

I like tennis
I like you
I like her
She loves me
You work for him
Give it to us
He kissed her
I need you
You need me
Tell them hello