Your message has struck a chord with me too! My Dh has always been a workaholic and as far as I can see always will be. The thing we argue about most is his hours and me nagging him about what time he'll leave the office so I can start dinner!!
I would say my DH would leave most mornings by 6am and wouldn't be home until 7pm at the earliest on a good night, more likely to be 7.30/8.00pm TBH. Then he spends the evenings after dinner, watching TV with me whilst on his laptop clearing emails or reviewing paperwork. It doesn't bug me as much as it used too as at least we are together.
The weekends are generally OK, although he will always manage to squeeze in a few hours of work but does this around our weekend plans. He'll often get up early, let me have a lie in and he sort out the kids and then get started on his work. I go running every Sunday morning and organise regular stuff for us to do as a couple/family in advance so he can juggle his work around whatever plans I make.
We are lucky to have no financial worries as he is well paid. Our marriage is perhaps not perfect, but whose is???? I love him and other than leaving, this is the only way I can see it working. It has been a very big thing for me to come to terms with and I have had my fair share of moments of anger and jealously and resentment. Like you, this was not what I thought raising a family would be like - being a single parent!!!!! I had moments when I thought I may as well leave and become a single parent - offically.
The thing is, when he is at home we still get on great, I do love him but just wish he'd work less or take a pay cut. After 13 years of marriage I 've accepted this won't happen, I can't change him , I can only change me.
We have 2DS aged 4 and 7. I accept I am a single parent Monday to Friday and now just get on with it as happily as I can. I have a part time job which helps. My husband calls me to let me know what time he'll be in for dinner. If its beyond 7.30pm, then I eat at 5pm with the kids. I then do the bedtime routine and have them down by 7.30pm.
Once the kids are down and if DH isn't home I have 'me time'. I might have a bath, give self pedicure, watch a TV show I recorded, check emails, mumsnet or read .
If DH is really late, say 10pm I head to bed. I am used to this routine now and this is how I spend my time when DH is travelling with work or just going through one of his numerous busy periods. I doesn't upset me as much as I used to as I quite like my 'me time' in the evenings.
Wouldn't it be great to have some sort of support group on here for mums like us??? Just don't know how to organise on- any thoughts??