experimentation etiquette?

I have a question, I'm female, I have a boyfriend but I'm interested in trying sex with a female. I don't know if I'm truly bi-sexual because I don't know how I will feel about it, I just think about it a lot. My question is, how can i experiment and still be fair to the other woman? A lesbian woman must be interested in a loving, lasting relationship just like anyone else... how can I go about doing this without using, hurting, or leading someone on? I have no intention of leaving my boyfriend.