I believe being a Father transcends how we feel moment-to-moment. We have to remember that everything we do is being observed, recorded, and processed in the present, and the future, and will be a key component of our children's emotional development... especially for children who are the products of divorce. They are always watching/observing, and although they cannot truly understand it all now, our interactions are being stored for future analysis... whether conscious or subconscious it will all affect the way they view the world, friendship, love and affection.
This is the thought process that guides the way I behave, the face I reveal to them, and how I impress upon them my values and attitudes about life, friendship and love. My father used to say... "do like I say, not like I do." I say... "do like I do!" :-)