Well if you really love him and plan on being with him long term, try to sort of form a relationship with the child. I mean, him and his ex will always have a special relationship even if he hates her or doesn't have feelings for her because that's the mother of his child. And if you can't handle that then he's not the one for you. A child is a big responsibility and that child comes before you to him automatically if he's doing his job right. You have to learn to deal with that and love that child or leave. Not trying to be rude, but that's a hard situation. And it's one that takes mature and responsible people who are going to take care of that child and still know there places with one another. Because if one day your that child's step mom his ex girlfriend will be in your life until that child's 18th birthday.