What to do with a bent but not broken aluminum seat stay unfortunately I got hit by a car. I was on the main road, in the cycle way and the car had a stop sign coming out of a school. He did see me but got distracted by the kids. Anyway, I was wondering if you could help me out determine is my bike is safe to ride or I should do anything about it.
The rear fork is a bit bent but not broken and it's aluminum. It's a Cube SL bike.
Thanks in advance!
Aluminum alloy is weakened by being bent. The seat-stay is bowed in so that loads will tend to bend the stay more. The stay probably will not fail suddenly, but it will develop a crack where it's bent if you keep riding it.

It's probably OK to ride on temporarily, even if the stay does fail the other stay will support the wheel. 

You say the bike is a Cube so presumably you are in Europe. The driver's insurance will cover the damage done to the bike, or you can sue the driver in some sort of small-claims court.