@ginamarie91,
Okay, well, consider this.
What if you were older, and you met Dave when you were older. Say, you maybe even had been married before, and he had been. But you were available (divorced or widowed). And he had a child. You'd be okay with that, yes?
Or no?
Because, right now, all I can see that you're angry about is not being first to have a kid with Dave.
You'll be second. Your child will not be the first born. Unless he's heir to the British throne (this isn't Prince William, perchance, is it?
), it kinda doesn't matter whose child is first.
Does it?