While this should probably be a given, it must be reiterated.
It doesn't matter if he's legally separated, broken up or any other creative excuse that he gives - stay away.
Even the good reasons don't stand the test of time and turn out to be bad ideas in good ideas' clothing.
Dating a married man aka being the other woman is one of the hardest thing in the world.
I remember couple years ago I let myself blindly get involved in a relationship with a cheating husband.
The women researchers who interviewed these people were of two opinions.
The first group said that women who went out with married men and got stuck had it coming.
I put up with every single one of the traditional married man excuse such as 'It's hard to just leave my marriage', 'if I easily leave my current marriage you will think bad of me - but I'll do it sometime since you're so special'...'I'm not in love with my wife..we're heading for separation SOON'..