2001 Honda Civic cooling system

I have a 2001 Civic and it has 200k miles on it. I noticed that the coolant keeps on going to the reservoir and not going back to the radiator, hence I keep on adding coolant to the radiator almost everyday. I also noticed that the coolant is being discharged when the car is parked overnight. I suspected that it is coming from the reservoir because the when I checked the reservoir, it is still wet. Additionally, each time I add coolant into the radiator, the radiator cap, when opened makes a popping sound, just like when you open a bottle of soda when shaken.

two of the mechanics I got advise from said that the car might have a blown head gasket. Now I am torn between having the head gasket replaced + head resurfaced versus having the engine replaced altogether.