Well, do you feel it?
I wouldn't be too worried if he's not feeling it, as long as you're feeling it and he's had his own orgasm!

I wouldn't be worried about how tight/loose your vaginal entry is.
Obviously you're enjoying sex.
Have you tried kegel exercises, "Squeeze in, squeeze out, squeeze in, squeeze out".
I did these when I was pregnant to prepare myself for birth, and I couldn't have sex for 8 weeks after the birth and I felt like a virgin again when I finally did have sex. It was good though.

Love those kegels!