Married in love with a lesbian.....confused by sexuality

I am a married woman with 3 kids. I have always been attracted to other women, but always thought it's a normal girl/woman tendency. I expressed my feelings about women to my husband and he understand and is supportive. 6months ago, I was leaving my old job and saw a HER walking along the road. My reaction was "ooo, wow!" I saw her walking on the street twice after that. I switched jobs 2 months later, and walked into another department and there she was. It took me 2months to actually walk up to her and say hi, which I did we hang out a few times with friends. She's a lesbian and I also expressed my feelings to her, she doesn't want a relationship. Which is fine by me but I still fantasize about her, think about her every moment of the day. We flirt a few times My problem is I've never been intimate with another woman.
I don't know what to do if I get to that point and everyday I question my sexuality. I have became more and more attracted to women than men.

 

I have spoken to my husband and he doesn't mind if we had a relationship casual or not.
In regards to whether or not shes attracted to me, shockingly one of her friends told me shes into girls who's the perfect ten/ hour glass shape. Honestly that's not me i am voluptuous not the hour glass figure. That sting a bit , the problem is she gives me mixed signals, she will invite me to join her during her lunch break maybe two times in a row then its nothing, i have to start a conversation with her first. If we hang out and she will give me that i want you type of signal and the first time i reacted. she was into it, until the next day she acted as though she regretted it and a bit annoyed. The second time she gave me these signs i didn't react towards it and she seems annoyed again.