What will bring us true happiness? Some things might seem like they will make us happy, but they really won't. For example, you might think driving spikes into your skull with a ball-peen hammer will make you happy, but it won't. I know.
Will putting a squirrel down your pants make you happy? Maybe, for a little while, but is it lasting happiness? Also you have to take into account the happiness of the squirrel. If the squirrel you have in your pants is unhappy, it will be difficult for you to be happy yourself.
Love may bring you happiness, but there are many kinds of love out there. For example, you may love spaghetti, but would you want to marry it? If you did, you wouldn't be able to have children. Maybe that's a good thing, considering how they'd look. You could always adopt.
And money. Many people believe money will give them happiness. They're right. If it doesn't give you happiness, you could use it to buy something that does.