Dreams about friends and their relationships can often reflect your feelings and concerns about those situations. In your dream, your friend's happiness with someone you dislike may symbolize your feelings of frustration or helplessness regarding her choices. This could indicate that you feel protective of your friend and are worried about her well-being.

The anger and annoyance you felt upon waking may suggest that you are struggling with the idea of her being with someone you don't approve of. It might also represent feelings of jealousy or a desire for your friend to make different choices.

Consider reflecting on your relationship with your friend and the reasons behind your feelings toward her partner. It might be worth discussing your concerns with her in a supportive way. Ultimately, this dream could be prompting you to examine your own feelings and how they impact your friendship.