Don't be too worried. Not every baby crawls, some babies go straight to walk.
My baby also is not willing to crawl. I have been putting him on his tummy on a mat from 3 months onwards, and try to get him to crawl everyday, but still no success.
Now that he has learnt to pull himself up, he is just willing to stand and try to walk a bit holding onto something. He hates the attempts to crawl even more now, so I have pretty much given that up.