Suffering is part of every human life: illness, loss, failure, loneliness, the slow weight of worry. Pain itself may be unavoidable, but how we carry it changes a great deal. Some people are hardened by hardship, others softened, and many simply ask why it has to happen at all. These are old questions, and people have always looked for steady answers.
The Gita offers perspective before it offers advice. Gita 2.11 says the wise do not lament in vain, because they see beyond the changing body, and Gita 2.30 says the same indestructible self lives in every being, which removes the basis for endless grief. Gita 2.65 says that in serenity sorrow ends and the mind quickly steadies. Gita 6.22 describes a person established in the Self who remains undisturbed even amid great suffering.
The Gita does not ask us to deny pain. Gita 6.23 describes yoga as freedom from union with sorrow, practiced with firm determination and without losing heart. Gita 7.16 adds that people turn to the Divine from many motives, including relief from suffering, and that turning toward something higher is itself good. Start where you are, cultivate calm, and keep practising. If pain feels unbearable, please also speak with a doctor, counsellor or trusted person.