9 month old milestones

Ash

Is anyone else's 9 month old not crawling yet? Not that I want to rush anything but my son is almost 10 months and not crawling yet while my friends 8 month old is already standing and cruising. I try not to compare I know all babies are different, I just feel guilt over maybe I haven't done enough as a mom. I feel like I give him plenty of tummy time and play with him all the time on the floor. Maybe it's just annoying me that my friend brags about it so much and then I feel like my son is behind when I know he's not. Anyone else's baby not crawling yet?