Mental Harrasment

This is Sunil Kalapala from Hyderabad. I would like to get an opinion regarding my family situation. I have married Lavanya 5 years back.We have a son of 2 & half years. I was the only earner in my family. From the beginning since our marriage, she picks quarrels of no points and I am a little short tempered in the beginning but now i have become more careful in controlling my emotions. After 6 month of my son's birth she has taken him to her parents house and kept him separated from me for almost a year. I was not even there for his 1st birthday. Then I have taken my friends to her place and let them come to a decision. At that time i have bought a car on instalment thinking she will come. I actually dont like their family and i am not comfortable with them bit still i have stayed in their home so that i can stay with my son. Six months back she came to my house and i had to shift everything from their house to my house and after three months of shifting she got a job in govt sector posted near to her parents place. Then i have resigned my job and shifted to the place she posted and took a house on rent. But her parents started harrasment saying keep my son with them for 4 days and with us for 3 days. I did not agree to it and after some days while i have raken my wife to board a bus to her office she has taken my son with her and she never returned back and this has happened 15 days back. She does not reply to my messages and calls. I am in a mental shock and on the verge of going into depression. I am holdingvcontrol and i dont know for how long i can hold. As i dont have my parents and i am alone, i cannot send somebody to her place for discussions. I am not able to understand what i should do further. Kindly suggest me way to take rhis ahead legally and actually want my wife and son to stay with me. Kundly suggest on what i should do pls.... Thanks and Best Regards