If you live in such a crappy neighborhood, I suggest you keep the door locked at all times, not just when you go to bed, and he should have his own key!
But that's another issue. I think most here would agree that keeping you abreast of his whereabouts and expected time home is a simple matter of consideration for the one you love and live with. If I were you, I'd also request that you meet his date.
The world opens up... when you do.
Oh, oh, can't you see? Love is the drug for me. ~Bryan Ferry
"Love is that condition in which another person's happiness is essential to your own." ~Robert Heinlein