Your sexuality relates to who you are as a sexual being, your feelings about sex and how you express them. You are always a sexual being regardless of when, how and with whom you choose to express it. Sexuality is lifelong, it doesn’t just turn on and off.
Your sexual identity means the way in which you refer to yourself as heterosexual, lesbian, gay, or bisexual. Your sexual identity can also be different in public than in private. For example, if you are gay, you may feel confident and supported to declare this identity among friends, but publicly feel pressured to identify as heterosexual.
Sexual orientation means who you are attracted to (men only, women only, or men and women).