If you got the belt on somehow magically wrong, I am forever going to call you "The Magician"
If you can't see it leaking, But the belts squeak there'* probably water on them somewhere, Figure out where it'* coming from. Your water pump maybe out.... maybe the coolant bypass hose is faulty...
Wait. Did you bleed the cooling system? That would cause it to overheat.
Take off the radiator cap
Start the car
watch inside the rad until you see the flow open up.
on the T-Stat housing is a flathead screw, loosen it.
Leave it open until you get a steady stream of coolant and get all the air out.
Close the screw down, put the rad cap back on.
See if it still overheats, If so, I bet water pump or bypass hose.