Dreams about missing out on events, especially ones that involve friends and excitement, often reflect feelings of anxiety or fear of missing opportunities in your waking life. Your hesitation at first could symbolize a reluctance to embrace new experiences or to step out of your comfort zone. The excitement building as the concert approached signifies a growing enthusiasm for these opportunities.
However, losing track of time and ultimately missing the concert may indicate a fear of not being able to seize chances when they arise. Your friends' reassurance in the dream suggests that you have a support system in your life, and they want to encourage you to take chances without fear of failure.
This dream might be urging you to consider how you approach opportunities and whether there’s something you’ve been hesitant about that you should embrace. It might be beneficial to reflect on areas in your life where you feel you might be missing out and to think about how you can be more proactive in seizing those moments.