I need help.  I am a single 39 year old woman, due to divorce not by choice.  

There is a person on my job that I have known but has recently been conversating on a daily basis.  Mostly about work and life issues.  In talking to this person I'm finding myself being more attracted to him.  He is a christian man, same age, very good family values.  He is also married.  Some of our conversations have revealed (by him) some concerns he has in his marriage.  On several different occasions he has mentioned leaving his wife, which I feel is wrong.  I encourage him to go get counseling for he and his wife.  They have three children.  Sometimes I feel like he may really serious consider leaving if one more incident occurs.  I'm trying to be a friend. As I do believe that we are friends.  There are times that I do feel my attraction for him leaving the stage of friendship to wanting more of the relationship, which can NEVER EVER be.  

So do I stop talking and being a shoulder to lean on or a sounding board?  And if so, how do I do that without him ever finding out how I am starting to really feel about him?  I don't want my feelings to destroy a friendship and make things awkward since we do have to work together.  I don't think it's good for him to know ever how I feel.

Am I wrong to have these feelings?  Even though my own marriage did not last because my husband didn't want to stay after he cheated on me.  I STRONGLY believe in marriage that everyone should stand and FIGHT for their marriage and family.

Sorry this is so long.  But I don't really have anyone that I could taltk to about this subject.

Thank you.