"(plenty of dates but nothing developing into anything meaningful)"

There's nothing better than meaningless sex.  And it burns calories.  Any pictures?

How to lose weight: 

When you're tempted to have a fattening snack, take a nap instead. 
Have spaghetti for breakfast rather than for dinner.  I just finished a meatloaf sandwich, and it's only 8:30.  Tonight, I'll have a bowl of cereal.
When you want a big glass of Pepsi, have a big glass of water instead.
Ask a hot chick if she'd like to go jogging.  And then actually go jogging.  Then shower together and have meaningless sex.