get you out of my mind

How do you say that?

odejdz z mojej mysli

it's more like przestać myśleć o tobie

That's like "stop thinking about you"
This is a phrase that cannot be exactly translated.

Something more like wyrwać cię z mojej pamięci?

But some translations can be closer than others. polishgirltx's suggestion is as good as it gets.


You could have done worse, but this is bad enough.

it means to destroy the memory of someone or something does it not?

It does. The phrase though doesn't sound natural, and as usual you proposed it after a plausible translation has been already offered.