Yes, well, the someone who has a child, already, sounds like you should pause and give this a lot of thought. Despite the attention and signals you're getting on FB, the presence of a child is a big concern. You can dismiss it, but children are important, and if you are ambivalent about dealing with such, just be friends with this person and move on.

I should add, I work with the local Supreme Court in teaching parents of divorce about dealing with their children. It's no small thing, entering a relationship with a potential partner who has a child.