Morningstar, I am just going to bed, but noticed your post.
Breaking the cycle is really really tough.
The depression saps your ability to do anything and the less you do the worse it gets. I have been to a similar place to you and the best thing I did for myself was give up drinking. Although I understand how hard that must be when you find it such a comfort. BUT depression likes alcohol and alcohol likes depression.
Your life won't change overnight but you can turn things around, little by little, and as you start to notice changes, it motivates you to do more. It sounds like your self esteem is pretty low and I am for you.
Me time is important, and I would really suggest trying to find a little something to do with it. Oh god....crosswords, sudoku, a craft, is there a night when DP could be with the children and you could access an adult education course?
can you talk to your doctor about CBT, or more effective ways of managing your depression, rather than just 'dealing' with it? I know sometimes it is not that simple, but recognising when you need fresh air, or company might help.
Can you ask DP for help in trying to find the 'real' you? Acknowledge that you realise you have changed but that it would be lovely if he could help you and maybe spend some more time together.
Each time you achieve something, give yourself a pat on the back. Depression makes the ordinary seem insurmountable so recognise that you are doing a great job under trying circumstances. I know so well how hard it is and someone made me laugh about depression saying 'the only way to eat an elephant is one spoon at a time'.
So, OK, it is going to be a challenge but keep posting on here, be kind to yourself and I would strongly advise that you speak to a doctor about the fact that you want to move forward in life, and not just remain on AD's, which I think can numb you to so much.
Wishing you all the best and I hope even a little bit of this helps somehow.
I am coming out of the longest depression I have ever suffered and if I could do anything for someone in that place, would gladly do so.
The 'other you' is in there somewhere and she just needs coaxing back out to play in the sun.
Take care and be kind to yourself. xx