He definitely has some love like feelings..he is definitely,101% physically attracted to her.He does want her happiness.He misses her when she is not around.He cannot put those feelings together,and confess it to her,like a man.
The portrait issue.Thats explained by Pavlov's theory.It kicks in when he starts looking at santu with desire,and happiness.
you know what dude, i think he is a bit emotionally retarded, and can't seem to realise he has some feelings for her, but i think he'll only make the connection AND express it when something big happens - the divorce and thought of losing her wasn't enough, nor was the thought of her being with another man?? that to me says he's not truly in love with her and i have NO IDEA as to what will make him confess.