If I could make a comparison, since diagnosed with bipolar and other stuff there was a number of people that believed it was silly. "Snap out of it" they'd say.
In the end I had 2 chouces- remove them from my life or distance myself and maintain a relationship.
In your case two comments I have-
1/ well done in coming out. Be proud of yourself that you have found the courage. It's your life.
2/ it must be very difficult for others particularly your parents to accept. A couple of months is not long enough. Up to 10 years is realistic. Be patient. Keep your relationship stable by sticking to other topics.
It would be great to have your parents support. But, we can't always have what we want.
Continue on your chosen course and smile.