Sounds like a combination of everything you've mentioned in your post.
I expect the thing to really think on is whether you are looking to move on with a female relationship, where your husband sits in that dynamic or whether you are just reminiscing or longing for another sexual experience with a woman. And if that's the case where does your husband again fit in the equation.
If it's a relationship then the options are to separate or discuss an open marriage.
If it's sexual then yes as Pocket says you need to speak to your husband and ascertain how secure your relationship is to allow you to have a separate sexual relationship with a woman, or for a woman to be involved with you both in some way.
Obviously the latter can be more complicated - you'd have to meet someone also bicurious who found your husband physically attractive and then the rules about sexual contact with your DH would need to be defined. Would you be happy to bring a woman into the bedroom and share your husband with her, would he watch etc etc
The former option, I think is dependant on the male in the partnership, some men don't see women as a threat to monogamy for some reason and can live with a private bicurious "habit" for want of a better word.
I suppose I am classified as bisexual/bicurious. However my experiences were always as a single woman, playing with single people. I've no wish to settle with a woman, and have a day to day relationship with her, but I do from time to time crave the taste and feel of women.
When we first met my partner was ok with me having a separate sex life it's a female (I didn't because I still felt it unfaithful) now that his feelings are deeper for me he can't think on it.
I am happy for him to be with me, but I'm not sure if want him deeply participating with another woman. I'm totally selfish and she'd be mine to pleasure.
I'd be happy for him to do some things though. Same for me if he wanted another guy.
So it's a complicated dynamic. We haven't worked it out yet. We enjoy taking about it though and he wants me to feel fulfilled.
However I am very wary from previous experience of forming a relationship in this scenario, for me it's a ONS experience.
I think the only way forward might be to visit a Swingers Club and then if a connection is made, use a private room.