Personally, I don't see what the big deal is. I have plenty of male friends. It's totally up to you how you behave and what vibes you give off. If one of my male friends mistakes my being friendly for flirting, I'll remind them that we're nothing more than just friends. If they don't want to lose me as a friend, they'll learn to accept that.

*****If you haven't got anything nice to say, don't say anything at all*****