empty? what should i do?

Sometimes i can't understand myself. I said to me "Hey, cheer up, nothing can make u be sad" but.........what's a bad feeling! What am i doing? what is every thing going on? I am confused, bored.....The more busy and noisy Bangkok is, the more empty and lonely i am. I walk on the crowded road, I have a feeling of being invisible. I miss my old life, my family, my home town which is such a calm and happy land. At least, it seem to has my existence there. Life is hard to control. How to adapt?