I'm so sorry to hear that....nobody has right to tell you what to do...you got to do whatever is more comfortable with you....
You need to be yourself....and to do that I don't think there is any need to get detached from your family...family is very important....
probably, you either got to talk to them and tell them to stop giving you advice, or just listen to them and not apply it in your life....then they will give up....
My family sometimes give me headache too....like the other day, my mom called me and told me why I don't get married or whatever.....it's so funny...I'm trying to find a guy in my life and I need a partner so much but it's difficult to find then my mom is just pushing me to get married...with who? now you understand how unreasonable they can be....then she told me that I want to fall in love and get married....yes, of course....hehehehe....what it's not a 14th century to just get married with any guy coming into your life....
Anyway....don't let them to make you depressed....be happy with what you are and let them know strongly....tell them that you are different than them and they got to accept you because you are the family!
take care
Marjan