Dearth and plethora

I've had a plethora of romances and offers of prospective romance throughout my life. There's always been a dearth of legitimite offers.

I tend to attract the types that are already taken . Committed or married or just mentally unavailable.
I've had men tell me they'll love me forever but that I deserve a life without them. That in the long run I'll see how much better off I'll be. In their own words, they're not worthy.

I'd really like a guy that was just mine. Round the clock.
Apparently that's just too much to ask.