Can we really be friends?

I am a 30 yr old out going gay man who loves meeting new people, and having diverse friendships. Although, recently I’ve noticed that my friendships aren’t as diversified as I once thought. I’ve come to realize my friendships are mainly with females and other gay men. While I cherish the friendships I have, I started to wonder why I don’t have any straight male friends? and would it even be a possibilty to obtain? After discussing it over with my friends I was told “if I didn’t grow up with one forget about it!” ,or ” very few str8 guys are comfortable with that”. It bothers me to think it can’t happen because I’m a cool guy ( if I say so myself) .I decided to ask the community, ” Can a gay man and a straight man be true friends?”