Subsurf modifier not working. Is it because I booleaned or because of my tris? I have this reference picture that I put into the side view of my project. 
I used a cylinder and then booleaned the bottom part to make the cutout. Now my subsurf modifier doesn't work. What is going on here? 



I tried insetting and extruding the bottom to see if that would fix anything but it didn't. Did the boolean mess up the subsurf or is it because I have some tris left over?



Here is the subsurf mod view:
the solution is really easy. Look at your modifier panel. There is a camera symbol an next to it is a eye symbol. click on the eye and now you shoud be able to see the changes. the eye symbol means that you can see your modifiers in the viewport.