I'm very confused about my sexuality! Some days I think I'm lesbian, some days I think I'm just straight, other bisexual. I just don't know anymore.. any advice?

Why do you need to define yourself with a label? Can't you just be who you are? If you meet someone you love I suppose their gender defines your current "sexual label" but other than that why does it matter which of the categories you fall into?

Could you be a tri-sexual? Try anything once?