I understand perfectly your pains, it is not easy to face this but for me
True happiness and inner peace flow from our submission to the commandments of the Creator and Lord of this world. God said, in the Qur'an:
"Is it not by the evocation of God that the hearts are quiet?" (Koran 13:28)

Inner peace is in Islam, I advise you to read more about Islam or just listen to the Koran you will feel at peace and will help you a lot to overcome the stress of life