That is great you have met someone.  I really hope it works out for you and that you have many happy years together.

I would explain to your son that there are 2 kinds of dads in the world.  There is the kind that helps to create babies, but they don't always stay around, and then there is the kind that is Dad- they are the ones who are there for the kids and turn mum and kid into a family.

As for him not knowing his father, that's sad, he does need a male role model so if this new man is prepared for the parenting challenge, then reel him in and fast! lol.

Hi,

My mum and dad split when i was about 1 1/2 - 2, andmy mum starated dating not long after, apparently i would always stop them holding hands hehe but i also knew my dad so i guess thats different.

I think if you try and explain to him even if he dosen't get it, you have told him for later on when you try and explain it again. I also dont think it matter if he does get confused at a young age love is love. My stepdad treated me like a dad (we have had rocky road but i think everyone does) and sometimes it is just easer to say this is my dad or i am his daughter, so he may not be biological but he can still be a dad.

Hope that helps.... if you could make any sence out of it hehe!

If he is "the one"  have the  talk with  him first about what his expectations are of his role  in yours and your sons life and your expectations as well then you are both starting off on the same page  and there are no misunderstandings. If  that goes well  slowly increase the time that he spends with you both so that your son gets used to having him around and seeing you together.

good luck and I hope this makes sense