I have two annon. questions about coming out as bisexual. I will answer them together.
There is little you can do to convince someone that bisexuality is a real thing. I would suggest knowing that you know your sexuality and it doesn’t matter if someone doubts you. It must be hard, though, to be considered invisible.
For parents not talking to their kids after they come out as bi- Try to keep the lines of potential communication open. Don’t burn your bridges. When you are independent, self-supporting, and if things are still just as bad, you might have to accept the fact that they aren’t going to be in your life. In that case, you create your own family…family of choice. You will probably end up doing that anyway.
To make it easier…I really wish I had an answer for that.