Hi Alice. This is what I think about your situation...
Fist of all, you need to see that this guy is NOT been fair with you at all. I mean he's dating that actress and still wanted to see you and keep you as his plan B. And also he's not aware about your feelings at all. He knows that you are watching the news and saw him with this actress (that must really hurt) but keep telling you that it's not over?? COME ON!!! Open your eyes! Don't let him get with this.
Like SD says all the time ACTIONS SPEAK LOUDER THAN WORDS. If he really cares about you then he shouldn't keep on dating this actress...
Show him that is his loss. Start NC right now. And don't break it, even if he calls you!
You need to see in the news that he's not dating this actress anymore and then, just then, you can speak to him again.
Good luck and I don't speak english too but I hope you got my advice.
Keep us posted.