Stalling after warmed up, overheating

Hi, my car was stalling at lights after it got warmed up or at a traffic stop or anywhere actually. I would eventually have to put my foot on the gas pedal and my other foot on the brake and sometimes it does it real bad and sometimes it is not. I replaced a fuel filter. But that did not do it. Then I have a problem with overheating my overflow is bubbling water when it gets hot my engine gets hot it just starts bubbling out the lid. So I replaced the thermostat that is not it. I would appreciate anything you have. I also bought a new cap for the overflow just in case that.