Should I reason, Keep it myself, o come cean?

I got into a debate about Gay rigts with me Horse Riding teacher and she kept saying being Gay was choice over and over I tried to reason but I ended up leaving the granero in tears in front of everyone and sat out there and cried. Should I come clean, o keep it to myself. Im afraid of what she would say, shes very religous person and im a bit anti-religon. So should I try to reason, keep it to myself o come clean?