Even I asked the same question to myself after watching the movie. I have arrived to the following conclusions:-

1. Always be open about your emotions. Never try to hide them. They need outlet.
2. Good friends are blessing of life. Never let them go.
3. If you love someone, be clear and let them know in the most respectable manner. That person must know how much he/she is adored.
4. Life is full of ups and downs. Instead of committing sucide, be brave and face the problems with utmost patience and hope that everything is gonna be alright
5. If a family member is hurting you knowingly or unknowingly, better let them know. Or talk to a responsible person about it. Else it won't take time for a family to break apart.

Hope this helps.