Husband is a lesbian?

I am hoping to have some guidance. I am married for
almost 10 years. Last year my husband told me that he was a woman. He's always been a woman and that he wants to have surgery. He explained that he was a woman before we were married too. He dressed in my clothes and some of his mothers. He claims that his feelings are female too.

One word that stuck with me was when he told me "It
doesn't matter if I am an attractive woman. I need to
be on the outside, what I am on the inside."

He thought that we would still be married and that I
would be ok with a lesbian relationship. I told him I
was not. We went to therapy together and individually
since that time. He even threatened suicide a few times.

During therapy he claims that he wished he never said
anything to me about his feelings and that they were
wrong. He had a troubled childhood and is suffering
from PTSD not gender identity.

I am not sure if this is true. I admit I am
hypersensitive to this issue and worry about my future
with my "husband." He has not been to therapy in over
a month and since his "coming out" we've only had sex
maybe five times. I wondering if this is a bad sign.
I'm thinking it is. This week I have pushed for him
to return to therapy.

I'm not sure if he is now denying that he is a
lesbian. I honestly would rather not stay with him
only for him to "come out again" ten years from now.

Can you offer any insite? Thank you for taking the
time to read this.