How can I stop this from happening again?

I'm a 38 yo male and since I've been old enough to date I have been hearing the sentence "...but we're such good friends and I don't want to lose that". Or the alternative "It would be like dating my brother". Now, I'm not a model, but I'm handsome enough. I have a good personality, I'm funny, witty, happy, etc. I do have a daughter (who lives with her mother) who was born when I was 20. It has happened so often that my will stipulates my epitaph: "He was everyone's friend". (no lie, that's actually in my will.) But I'm really sick and tired of this. It happened again with a woman yesterday (christmas day). We've been dating since November, dinner, movies, meeting each other's families, etc. but no physical contact. Then yesterday she tells me "I don't want to ruin the friendship we already have." This last time she told me "Sometimes friends become lovers". I told her "Your lips to Gods ears, because it's never happened in my lifetime except on TV." Honestly I have 4 sisters and more than a dozen friends that I've gotten this way. At this point I've got enough "friends" I want a lover. BTW I'm not an idiot, I realize these ladies are hiding behind this statement and are just not being honest with the reason they don't want to date me. But while I generally become their best girlfriend, this seems to be something they won't talk about. Honestly, what the hell is going on, what am I doing wrong?