Many Christian men that I know will never ever let themselves be left alone with a woman who is by herself. I believe that Billy Graham wrote some common sense things about this once but I doubt I can lay my fingers on it quickly.
It's only through being exposed to such opportunities that you find out who you are...
Well, lets not understate it and lets not overstate it, either. I think being mindful that temptation is real and that it has a lot to do with opportunity, just cut down on the opportunity.
It's hard because no matter what marital status is, pleasant (nonsexual) interaction with someone you find sexually pleasing is nice. Just be mindful of it, and proceed wisely.