Hi,
Welcome to Dwarkamai. Can you define a Happy Life. In school there might be students who hate Mathematics where as some just love to solve the problems of Mathematics. Subject is same, Problems are same. Some Boys enjoy others feel pain.
Same is Life, Some wants all material possessions, Beautiful partner, a comfortable life where as some see this as merely reflection of delusion taking them away from Lord.
Just change your focus towards life. Everything will get settled. There is no universal formula for Happiness, Everything depends on attitude. Take all troubles of life as a challenge or test that you have to qualify for a better and worthful life.
Move ahead in life with confidence feeling presence of Baba with you always!
No problem is permanent! Just try to have positive state of mind no matter where life is at present!
Have Faith! Have Patience!
May Sai Bless You!
om sri sai ram!