I spilled water on my gfs laptop last night
Why did you spill water on her laptop?
She was paying more attention to her laptop than to me, so I wanted to ruin it.
You shouldn't be trying to damage someone else's property. That's something they are going to have to pay money to replace and it's very inconsiderate.
But she should pay more attention to me.
Ruining your girlfriend's laptop isn't going to get her to pay attention to you, it's just going to make her mad. You should really apologize to her and offer to pay for the damage.