I too have struggled recently with the subject of "dating". I think it is a very personal choice, and there is no right or wrong answer.
My H has encouraged me to date too, and I know it's to salve his own conscience. I have pretty much decided that I will move along each day and make it as happy as I can and trust that what is meant to be, will be. That means that I still love my H with all my heart and hope that he finds his way home. However, I am not putting my life on hold, but then neither am I looking for another relationship. I am concentrating on me and my S17, and if someone comes along that really feels right to me, then I would slowly explore the possibilities.
Even my C says that spending time with other people is very good for self growth and esteem, and therefore very healthy both for you and your future relationship(s) whether that be with your spouse or someone else.
I guess it's all in how you approach it. You definitely want to be careful about getting involved in something without having dealt with all the fallout from your sitch. But, healthy interaction and friendships with others is not, IMHO, something you need to deny yourself.
Take care!!
TJ
Me45,H49 D24,S18 M26,T28 Bomb 3/19/08 Sep 6/23/08 EA/PA with Secretary 2007-8 3/2009 H moved in w/OW2 7/2009 Let him go w/Love. 8/2009 Legally Sep'd