Dreams can often reflect our subconscious thoughts, feelings, and experiences. In your dream, several key elements stand out that may provide insight into your emotional state and current life situation.

1. Facing Mortality: The diagnosis of dying and having only a week left to live may symbolize a feeling of urgency or anxiety about life changes or unresolved issues. It may not be a literal interpretation but rather a reflection of your feelings about time, health, or situations that feel out of your control.
2. Connection with Others: Spending time with an old friend and talking about children may indicate a longing for connection and support. It suggests that relationships and shared experiences are important to you, particularly during challenging times.
3. Helping to Defeat a Monster: This could symbolize confronting a personal challenge or fear. The monster may represent obstacles in your life that you feel the need to tackle, possibly linked to the feelings of mortality.
4. Football Training Facility: This could signify a desire for teamwork, strategy, and preparation in your life. It might reflect a need to build skills or work with others to overcome challenges.
5. Hugging Your Best Friend: This act of affection suggests a deep bond and support system. It may imply that you find comfort in your friendships, especially when facing difficult emotions or situations.
6. Playing Video Games in a Dark Room: This could represent escapism, relaxation, or camaraderie. The light in the dark room might symbolize hope or positivity amidst uncertainty.

Overall, your dream may be processing feelings about mortality, the importance of friendships, and the challenges you face in your life. It could be beneficial to reflect on your relationships and any current challenges, considering how you can seek support from loved ones during times of stress.