Feeling upset in this scenario is understandable and valid. It's natural to feel disappointed when plans you made with your boyfriend were canceled or changed without prior discussion or agreement. Communication and mutual respect are essential in any relationship, and it's essential for partners to consider each other's feelings and commitments.
However, it's also crucial to remember that everyone makes mistakes, and miscommunication can happen. It might be helpful to have an open and honest conversation with your boyfriend about how you feel. Try to express your emotions calmly and give him a chance to explain his side of the story. Maybe he genuinely couldn't say no to his friend for some reason, but it's essential for him to understand how his actions affected you.
In a healthy relationship, both partners should be willing to communicate, compromise, and make efforts to understand each other's needs and feelings. If this becomes a recurring issue or if you find that your concerns are consistently not being addressed, it may be worth reevaluating the dynamics of the relationship.
Remember, open communication is the key to resolving conflicts and strengthening your bond as a couple.