turned out to be a faulty radiator. i got my new one put in and no more problems.
i think the car overheated once and split the radiator at the bottom but it wasnt leaking bad enough to see it, then it just got worse and worse until i could finally see it leaking.
i warmed the car up and then let it sit for 10 min running and it didnt overheat so i think its all good.