Congratulations
You done real good, NO GREAT! Really proud of you!
It may not seem best now but you just started down a road of inner peace. No matter what happens you should have great pride in what you did!
Your parents have taken it a lot better than many. My mom found out by accident while cleaning my sisters room. Sis had found a couple love letters and brought them to her room while I was at uni.
Mom called me to see if it was true. I said yes. She said: I am going to kill myself! and then hung up the phone!
I had to call her about half a dozen times trying to calm her down... she would go on about how she had been a horrible mother for this to happen, say she was gonna kill herself then hang up again and again. Finally I asked her if she still loved me. She said yes and realized that I was still her son and everything was fine.
Dad has always been accepting of anything as long as I wasnt hurting anyone...
I am sure that it will be uncomfortable for a while but that is just natural especially with you believing they knew all along. I think it is great that your dad asked about coming along to the meeting. Think it best ya go to the youth thing first and try to make friends and see what its all about then check out to see if there is a parent/child meeting. That would be great for you and your father and maybe mom. You could bring up topics such as the one your dad suggested about gays in the Philippines turning children gay... I too believe that gays are probably born with this preference for the same sex.
Really, it is just amazing what you have done and I hope that you come to acknowledge how strong you are! CONGRATS!