I prefer to suggest you as my own take of your family situation, as follwos----
First of all I would suggest you to calm down and do not utter any escalating sentences and 'D' words while talking to husband.
With the limited information, it would be my guess work to say that 'neither of you meant seriously about 'D' word but out of outburst and provocation uttered to live apart.
But don't let it embroil into a larger controversy.
Best thing is to restrain oneself first.............pacify the other party..take some time..........don't put other party into defensive............nobody likes to take blame and nobody likes other party playing 'politically correct' and winning social sympathy also. it results the other party getting into even more defensve stance.
Remember...................... even he might have something objectionalble to say about your temperament etc etc ............Neither you nor him are perfect (It is evident)
Many marriages which are actually not on the verge of break-up ... unfortunately led to the path of break-up due to above......and it affect the whole family.
You husband said 'you will get what you uttered (your loose outburst...its not really acceptable many a times ....but still it is correctable caling it a loose tlka and emtional outburst .... Even males/husbands commit hundreds of blunders and females/wives pardon them.........)
In your situation you (both) need to find a 'successful retreat from your verbal stand' and allow him also to retreat from his provocative response'....
Kya aap .... Daldal mein fase ko 'Sorry' bolne ka bhi mouka nahi degi?....ya aisa mouka aap ke liye bhi nahi chahegi?....
is situation mein jyada haat pair marenge to jyada hi niche dal-dal mein dhase jaoge!!!
who knows?...probably neither of you ever gave other party a chance even to say 'sorry'!!!!
But you need to do it quickly...and here time delay aggravates the problem and rather core issues are sidelines and people start fighting for vindication.........but when 'D' word is uttered there are no winners......both are become losers ..... as neither party would relent/buckle easily.
Try and give ample attempts to show that you intend to do something 'for marriage to work'
and also don't take credit also for that as if you only understood the value of marriage...
even other party might be going through enormous stress for likely hard decisions.
Erase the climate of suspecion in between you ...... And it can't erased by any third person (third person can only widen the gap.) ......... or talk by not talking the issue .......... but the message of 'White Flag' should reach to other party smartly ...... ....... Let him realise by actions ......... and being candid in approach.
"Office mein bhi sabke samne jab kabhi boss chillata hai to sabhi haske hi lete hai...to private mein .......... husband ke sath ego problem kyu hai?".
Don't involve anybody except you both .......
(anybody means ANYbody.........from wither side of you both..and it includes parents, relatives, friends and so counsellors also.....all these would make harm only in case like yours..........both of you seems not be controlling emotions while fighting to each other...you both are culprits)