I think too much emphasis is paid to perfection. Being the perfect daughter, sister, wife, mother and so forth and so forth will make you happy. What is happiness? Who makes these rules? Who decides that if you do A plus B and C it will be equal happiness? You can have the 2.4 four kids, house in suburbia, the social life, the job that pays for it all and then some. ..but you still don't "feel" it.
And that there is your answer.... You have to feel it. It doesn't matter whether you have those things or not,  you don't need anything to be happy. I don't need to say that its all relative. One persons meager bowl of soup is another's bowl of happiness, gratefulness and comfort. A few dollars to some means the world, that they can have the basics; milk, cereal, bread etc. Where I work, I see the happiness in someones eyes when they receive $20 to feed their family or get medicine and they are grateful, so very grateful.

Happiness is there for you and inside you, you just have to appreciate it and feel it.