Punctuation is wrong. Put a space after the commas.
Typo:
Do whant you want --> Do _what_ you want
Improvements:
you'll comprehend --> [you'll understand / you'll get it] ?
One day --> Someday ?
Fais c’que tu veux, tant pis --> Do what you wanna do, [whatever / I don't care / nobody cares] ?
Misunderstandings:
Un jour tu t’en voudras --> Someday you will blame yourself ?
Elle me dit, t’es trop nul --> She says to me, you are so lame ?
Sors un peu de ta bulle --> Slightly get out of your bubble (svajarova) ?
Tu fais n’importe quoi --> You are doing nonsense ?
On dirait que t’aimes ça --> Looks like you like that (svajarova)
VingtJuillet, if you need help understanding the French text, ask us.
Because... your translation is bad, very bad.
The English doesn't make sense too...
So, do not hesitate to ask us questions.
We will help you out!