Dreams involving classmates, crushes, and emotional confrontations often reflect your feelings about relationships and social dynamics in your waking life. Here are some insights into your dream:

1. House as a Symbol: The house represents your personal space or emotional state. Being with classmates suggests you may be processing social interactions and friendships that are significant to you.
2. Conflict and Protection: Your crush fighting with the nice guy indicates a conflict between your feelings for your crush and the support you receive from others. Your instinct to intervene shows your desire to protect not only your crush but also your own feelings. This could signify a struggle between affection and concern for how others perceive you.
3. Father Relationship: The mention of your father suggests unresolved feelings or issues related to parental relationships. It could indicate that you are sensitive to how others view your family dynamics and how that impacts your self-image.
4. Emotional Connection: Holding your crush's hand while crying signifies a deep emotional connection and vulnerability. This suggests you may be longing for a supportive relationship and possibly feeling overwhelmed by your emotions.
5. Expression of Pity and Longing: Your crush's expression of pity and longing could reflect your own fears of being misunderstood or not fully accepted. It may also indicate the complexity of your feelings towards them and the desire for a deeper connection.

Overall, this dream highlights your emotional landscape concerning relationships and the support systems you value. It may be beneficial to reflect on your feelings towards your crush, your relationship with your father, and how these dynamics influence your social interactions. Consider opening up to someone you trust about your feelings, as sharing can often provide relief and clarity.