I split up with my ex after a 2 and half years. she has a son now 4 years old. his real dad has never been around. her son called me dad when he started talking and now she wont let me see him, do I have any rights?
You would have to ask the a court for permission to apply if that is a route you are considering.
The first step would be to attempt mediaiton;
Thanks but does she have to agree to it. If she doesn't I don't have a leg to stand on
If the court give you permission to apply, she would have to attend.
Step parents that have played a big role in a childs life do get recognised and courts will make orders. The older the child and the longer you have been in his life the better your chances.
As Yoda has said, youwill have to attend mediation first before you can make an application to court anyway. If she realises that you are really serious about staying in your sons life she may agree to an arrangement for contact.
Best of luck