I want it to stay HIGH untill I press a button.
Slap that sensor around, and tell it behave, then.
Or, detect the transition of the sensor from LOW to HIGH, and forget about the transition back to LOW.
The detection of the reset switch is what should cause the flag, set when the PIR transitioned to HIGH, to be reset.
It is the state of that flag that determines what action to take, not the HIGH/LOW state of the PIR sensor.