I'm so alone I don't have any friend and family please suggest me how to enjoy life?

Find comfort in your own company and learn to accept it. Pets are a great source of entertainment. We only live one life so why waste it feeling empty and alone? There are many ways to enjoy life but you have to be the one to take the first step. Meditation will help put you in zen with yourself and feel at peace. Get a hobby that is active like working out at the gym. I realized that the engird you put into the universe is the same energy that is returned to you. Sometimes when I feel lost i watch Ted talks and its silly but it motivates me to pick myself back up.

I'm sorry you're feeling lonely but it is good to see you're willing to try things to feel better. Have you think about joining clubs or groups about something you like? As writing, dancing, painting, sports, traveling, learning languages. Those can be great places to meet people with similar interest and also enjoy an activity.

If you are being alone for your choice, that could be something normal you just need to consider having some hobbies that you can do by yourself like drawing, reading, or writing or even learning a new skill and having internet friends. If you are not having friends because of fears, you need to address them, ask your self questions, what will happen if I joined a club, or said hi to our neighbors? What if you tried to contact by phone or any other mean some of those who were your friends before? Do you accept when people approach you or treat them with detachment and aloofness? Are you allowing others to approach you? Humans are social by nature, so even if you are introvert, you will find some nice ones who will approach you either out of their own need for a friend, or out of their desire to help someone who might need something as they sensed it! Embrace life and cheer yourself up, life is suitable to be enjoyed by introverts and extroverts both. Love and peace.