Is it normal for a guy with many female friends to have a hard time finding a girlfriend?

I don't know... maybe there is, for girls as well. I've always had guy friends and I've never had a boyfriend 😅

Yes it is typical and probably related to how you treat these women upon first meeting them.

If you are interested in dating you need to make that clear early on, otherwise you risk being friend zoned. Once you are friends with a woman its very difficult to move the relationship to dating and romance.

Actually it's very normal.