Dreams often reflect our inner feelings and experiences, and your dream seems to touch on several significant themes.

1. Intimacy and Relationships: Your desire to be intimate with your first boyfriend but his reluctance may indicate feelings of vulnerability or a longing for connection that you feel is not being met in your waking life. This could represent a desire for closeness or an exploration of unresolved feelings from that relationship.
2. Family Dynamics: The shift to a family trip suggests a need for support or comfort from your family. It may indicate a desire to reconnect with your roots or the importance of familial bonds in your life at the moment.
3. Avoidance and Risk: Your decision to walk the track instead of getting on the roller-coaster may symbolize a preference for a safer, more controlled path in life. The near-miss with danger could reflect your awareness of risks in your current situation and your ability to navigate them successfully, showcasing resilience.

Overall, this dream may encourage you to explore your feelings about intimacy, reflect on your family relationships, and consider how you approach risks in your life. It might be helpful to think about areas where you feel safe or unsafe, and how you can create more balance between seeking connection and protecting yourself.