How to deal with certain guy friends?

I love having men for my friends, but it seems that lately, most of them have become interested in me romantically, and no longer will settle for "just friends." I feel like I will lose a lot of friends (these aren't people I can just say good riddance to. I genuinely care for them.) Is there anything I can do to not alienate them? I don't want to date any of them. Advice?