Your friend should still keep her plans with you, as the relationship is only in the early stages and it would be foolish for her to start giving up her long term friends because her bf says so. If she gives in to him now, then it will be harder for her to see her friends in the future without an arguement with the bf. However, he may be insecure and not realise that the two of you are just friends. A meeting with the pair of them would be an idea so he gets to know that you are not a threat. Of course you are going to be upset at being stood up and you could try explaining to your friend how it made you feel without being accusing or angry. Your friend will be the one stuck in the middle here, as she will want to keep both you and her new bf happy, and it will be hard on her to please everyone. Not sure if any of this helps, but could just give you a different view on things.