When my DCs were very young my H at the time, had this great idea that we would start a new fantastic life in France, and that he would commute to be with me and the DCs on a weekend. The reality was, he didn't show up every weekend and when he did he didn't do a thing to help. So at that point in time I was living as a single parent, in a foreign country. I didn't have/couldn't afford any childcare and youngest child was only 12 months old.
I set up my own business and like you I pretty much ended working into the night most days, I did this for years, as the DCs got older, I could leave them to play together for an hour but it's only in the last couple of years that they've been happy to ignore me as I work and they're 11 and 13 now. I got used to surviving on very little sleep.
They both went to bed at the same time, they still do. You can read in bed but once in there you stay there. When they were little 6.30 was bedtime so I cold have the evening ahead of me to work. Even now, they go up between 8.00 and 8.30.
You do need to find time to shower and look after yourself - I think I let this go, maybe because I was depressed, maybe because I didn't have time to blow dry my hair. I would always shower - baby's nap times, or they went into the play pen for 10 mins. I never had time to do my hair though, I looked a mess. That got me down. I do make a point of trying to be well-groomed these days, if I feel myself slipping, I just have to remember what I was like and the straightners and make up come out.
I never had a night out - I don't think I've had a night out since DS1 was born. I don't really have time for hobbies, TV etc, but it is getting easier as I get older. I definitely watch more TV these days.
I had no support around me, I was in a strange country, no family and no friends and a non-supportive H.
No money, because my H needed it all in the UK (to spend on gadgets and the OW, but I didn't know this at the time).
I was deeply, seriously unhappy and he wouldn't separate.
Four years ago we finally separated and divorced, from that day forward my life started getting better. I could cut him out of the equation so when I made decisions I only considered me and the DCs. Straightaway life got easier.
The DCs do quite a long day at school, but they're understanding now about mum having to work. They also went into childcare in the holidays which was an absolute godsend.
Looking back on my life, it was really, really difficult. I can't believe how I survived. But I did, and it's only in retrospect that I realise how difficult it was, at the time, I just put my head down and got on with what I had to do to survive. I think all single parents do this, you just crack on and deal with it.
Even though it was hard, the feeling of complete and utter relief I had when I found out my XH had another woman was amazing. I've never, looked back as a single mum. Also, the sense of achievement, I am the mother of two amazing, intelligent, polite young men. I did that, me, all by myself. I am so proud of them but also of what I've done. We're a great team these days.