If your therapist told you homosexuality is unethical you need to find a new T. One who will not judge you. a therapist should not be imposing their judgements on you.
It sounds like there have been a lot of confusing feelings and events in your past, and it's important you are given a non-judgmental space to work through them. I hope you can come to let go of the shame you attach to your past actions and begin to show yourself some compassion. Only then will you be able to move forward.