I think a key to answering this is:
Therefore to him that knoweth to do good, and doeth it not, to him it is sin.
James 4:17
There are always going to be situations that are difficult to work around. Personally, I can talk to two women other than my wife, alone, without feeling awkward. Mind you, I'm talking about being in the church auditorium, not somewhere potentially secluded. For me to be in such a situation would be wrong. I don't feel that to be right. But if I find a woman stranded on the highway in the middle of a blizzard and I
can help by picking her up and taking her to a phone, then I don't feel I'd be right. Just a thought...