Hi, this is my first post on this board, not sure why I haven't popped over sooner 
I have 3 DS aged 15, 6 and 2. All have different dads. Eldest and youngest see their dads every other weekend. Middle has never had contact.
I've met someone new and we've been seeing each other for 5 months. Currently all is going well. He's expressed an interest in being a good friend to all but maybe a little more dad-like to DS2 as time goes on.
DS2 has already had DS3's dad in his life, first wanting to be his dad and then dropping him instantly when we split at his instigation. So naturally I'm feeling an amount of caution is needed.
Does anyone have any advice on how to go about things? Has anyone read anything that sounds a bit similar? Or anything at all relevant? From either my perspective or my new partners? I'd like a guide book really, entitled "how not to fuck it up!" 