I don't think I'm familiar with this concept of creating a sexual identity.
When I was about 7 years old a friend and I did some "experimenting" one day. Both of us male. We're both heterosexual adults. Another example: four of my friends got into this sexual "experimentation" phase for a few weeks one summer when we were 10 or 11 years old. I didn't participate this time for whatever reason but they were friends and I was there on a few occasions. The guys were of various type. A jock, a "macho" guy whose parents were immigrants from Mexico, the neighborhood tough guy, and a hip kid. All average typical kids.
These guys all grew up to be heterosexual. They are married and have children.
I had two friends who were lesbian. One was pretty close for a while. She told me that she knew about her sexual orientation when she was a child. No trauma involved.
I don't know if sharing these memories helps you but I hope so. In my opinion, you are what you are regarding sexual orientation.
I haven't seen anything to make me believe that it's a choice or that you can be "turned."