I know exactly how you feel. I have been out on 'dates' with a couple of good female friends , and its good fun / company but thats all it is and sometimes one needs more. I know that one of these friends at least would be in for more but that for me would mean an emotional involvement that I would not be prepared for and would be unfair to her. So there we are stuck in this middle ground .
I too have thought about just going out and seeing if I could pick up someone " without strings " , but have not had the Guts to actualy do that and am not sure I realy want too.
I dont have the answer , just right there with you on how it feels.
Oh and you have been separated for a year longer than me as well , I may well be thinking very diffrent in a years time.