Welcome to SR.
You'll find that plenty of people maintain the external appearance of happiness while fighting great inner turmoil. Many also manage to be highly successful academically and achieve great financial success in their lives despite horrendous addictions and personal difficulties. Mental pain and addictions pay no heed to your status in life, intelligence, race, wealth or backround. They'll take whoever is going. In this you dont need to feel alone. Just because you have a priveleged background does not mean you are immune from these problems. Its not your fault.