His ex girlfriend is pregnant, but he has not told me yet...?

[Innogen]

Yikes. If you have opened up a lot to each other, then he should have told you this right away. How dare he let you pour your heart out to him and leave this crucial little detail out?! Keep your dignified distance until you know all the facts for certain from his mouth - give him the courtesy of letting him explain himself, but don't go running back to him no matter how much you want to if he has been lying to you by omission. If he has been dishonest with you, you are better off without him. There are guys out there who respect women a whole lot more than this guy who's wriggled his way into your life right now, and you deserve one of those. Wait for that; LOOK for that. Hang in there and stay strong!