Even without the effects of CSA clouding the picture, it can take a long time to figure out your sexual orientation. I was almost 21, and still a virgin, when I finally accepted my sexuality. If I hadn't had a supportive, loving community around me it probably would have taken me a lot longer.
Be patient. Give yourself time to sort through what's reactive and what's real in you. Lean into trusted friends who won't judge you. Answers probably won't come quickly, but they will come.
"Whatever is rejected from the self appears in the world as an event."
- Carl Jung