I dont love my life .. what should I do to be happy?

There are many ways to be happy. Here's a tip. Smile every day even though you don't feel like it. By doing something simple like smiling, laughing, etc... It will increase your mood to be happy. But if you keep thinking in doubt and do nothing then what action are you actually doing to make yourself happy? If you do something regularly like running, try adding some music while running. Simple stuff is the best to start. And if you do need help don't doubt. There are people who are willing to help.

The Creator provides knowledge and guidance to help you face adversities successfully. Besides helping us cope with the sorrow of death, Bible counsel can also help us to deal with economic and health problems. It can give you strength to endure social injustice and political turmoil. And if you apply its guidance in your life, it can help you to deal with other personal problems.
By studying the Bible, you acquire a hope that far surpasses anything human society offers. The resurrection of friends and family is part of the hope that the Bible sets out. Revelation 21:3, 4 gives more details: “God himself will be with [mankind]. And he will wipe out every tear from their eyes, and death will be no more, neither will mourning nor outcry nor pain be anymore. The former things have passed away.” This means that any source of sadness in your life will soon be gone forever. What the Bible promises will come true, and you can enjoy its fulfillment. Just knowing that better times are ahead gives relief. Knowing that you do not face suffering indefinitely after death is a reason to be happy.
I felt the same way you do and decided to find out from God. I prayed and accepted a bible study. Through this study I gained accurate knowledge on "What The Bible Really Teach." I am now one of eight million people who are happy despite the sadness and ugliness of this world system. You can too . Please go to jw.org for more information.