My dp is great with kids but can't build a relationship with his ds (6) It's so sad to see them together as his son just doesn't want to know. Dp's been split with the mum for years but gets on ok with her. She is very strange though (long story) so maybe her behaviour has influenced little one? She's the one who's suggested dp gives up his son. I just wonder if her being back with her abusive ex is something to do with it though? She may want dp out of the picture.
Ds has a bowel condition which can affect his mood and he is very very sensitive. My Dp gets so upset about the situation. My boys love him and get on great with their daddy so it must be hard to see.
I hope we can just keep on trying with him. Maybe as he grows he'll want to be with dp and us again.