car sex/make out advice pls!!!

soo me and my bf have been dating awhile. I’m 21 he’s 19 and we both still live at home while going to college together. he lives on base so like there’s no sneaking around and my house is a no boys zone for sure

the only place we can get intimate is in the car but I’m afraid of getting caught

usually we’d make out in the car in the college parking lot in the afternoons; I’d park by some bushes and hardly no one is around during the day time

We tried the mall but way too many people around

The best place I’ve found is going to like a third level parking garage when no one is around.

But we haven’t actually had sex yet just making out with his shirt off, feeling me up, and dry humping

Needs ideas of where to park?