OP, I was married to a man for 11 years. I left him, for this and other reasons 6 years ago. I was never really into men, have never found them attractive and was never romantically or sexually attracted to them. Let’s just say I did compulsory heterosexuality.
Anyway after 10 years of marriage and with a 4 year old child it all became too much. I’d managed to live a lie, if unhappily, but I couldn’t continue so I sorted my very complicated situation and left. There were other reasons as I’ve said, but this just gave me the push I needed.
Anyway, enough about where I’m coming from. What do you want? If there were no complicating factors and you could just do exactly as you pleased, what would you do?
As to whether you are a lesbian or not, well that can wait, but you need to consider whether you were ever attracted to men at all, and I mean properly attracted, not just wishing hard enough. You might be a lesbian or you might be bi, but that might take some time for you to figure out.
I don’t think talking to your DH at this point is helpful. He’ll either be upset and it’ll cause problems, when you really should be taking the time to sort out your own thoughts; he’ll see it as a chance to fuck two women at the same time; or he’ll just laugh at you and make you feel even more confused and shit.
I think you need to think about what is is that you actually want. If you do genuinely believe that a relationship with a man is not right for you then it’s not impossible to extricate yourself. I managed it and I had a 5 year old DC, I have a severe disability so I can’t work and no money. It was hard but I did it and I’ve never looked back.
Can I advise you against threesoms. They’re tacky, they’re nothing like what sex between two women are like and it’s just degrading. If you do genuinely believe you’re a lesbian then you’ll hate yourself for it.
Also, one last thing, if you ever do leave and come out, don’t be afraid of the word lesbian. It’s not icky, it’s powerful and a source of pride. Gay is a word for homosexual men, nothing labelled gay is for lesbians and gay men on the whole do not care much for us.