settlement

Hi!
I came to this country as a student in 2003 then met my husband & got married in 2010. My husband is a British.
i applied for my FLR(M) in 2011 august but was granted 3 years Discreationary Leave to remain till september 2014 ,as i failed to produce life in the uk & my application was late by 3 days.now i applied for my extension on FLR(O) & was granted another 3 years of discretionary leave till october 2017.but now me & my husband are not in good terms so we are separated living apart.
i can apply for my settlement only in 3 years so when i'm applying for my settlement in SET(O) form do i need to produce any evidence to the home office that i'm still with my husband
can you please help me

Have you got child/Children with this person?

I don't have any children with this person

He is British & we were married for 4 & half years now
Is there any other way that I can get ILR or citizenship

Can anyone please kindly suggest me anything in my case as I'm in critical situation