Help..I think I am Caught up.?

My childhood friend of over 20 plus years and I have reunite. Irisk of losing their girl and possible kids We have so much in common. We laugh and joke all day abt child hood memories. We have both found ourselves in somewhat incomplete relationships and somehow the mutual presence feel that void. I listen to him and here his unhappiness and he knows my story. How do we draw the line? The attraction is strong!!! He is in a relationship and I am legally separated and celebant for over 3 years..HELP!!