Belly crawling

My baby seems stuck at the belly crawl and I'm kind of feeling like a failure today about it. He can pull to stand on things and cruise with a push walker and get into the sitting position. He can get up on all fours but always goes back to belly crawl. He will even do it really fast instead of standard crawling.. Is this normal? Is he just not going to crawl.. I've been a little worried since it seems like all my friends baby's are crawling. Please no rude comments, Ftm