Dreams involving people we have feelings for can often reflect our emotions and desires regarding those relationships. Let's break down the elements of your dream:

1. Crush Patting Your Face: This gesture can symbolize affection and reassurance. It may suggest that you are seeking comfort or validation from this person. The phrase "I will never leave you" hints at a desire for security and a deep connection in your romantic life.
2. Crush Engaged with Your Cousin: This part of the dream may indicate feelings of jealousy or insecurity. Your subconscious might be processing the idea of competition or the fear of losing your crush to someone else, especially someone your family favors.
3. Being in Labour with Your Crush Present: Labour in dreams often symbolizes creativity, new beginnings, or significant changes. The presence of your crush during this vulnerable moment could represent your hopes for a supportive partnership, especially during transformative experiences in your life.

Overall, this dream suggests a mixture of longing for emotional connection, fear of competition, and a desire for support in new phases of your life. It may be helpful to reflect on your feelings towards both your crush and the idea of commitment as you navigate these emotions in your waking life. Consider how you can communicate your feelings or desires more openly, both to yourself and to those involved.