I have problems getting dates (hell, I haven't been laid in about a year), but I know damn well that's because of two things:

• I'm real picky - I want to actually like said people.
  
• Few of the people I'd want to date/snog/etc live in the area, and it's just too draining for me to travel over about twenty minutes.
  

(It doesn't help at all that I'm severely introverted, have interesting image and mental health issues, etc - but they're subsidiary.)