Reading all of this with interest.
Single 3.5 years after a 15 year marriage, our childcare split is that I have four nights to myself every fortnight. Tonight is Night One.
I am extremely proactive in reaching out to friends, organising my own birthday, having people round for dinner, but the reciprocal invitations from my married friends are nil. My married friends unfortunately are always the ones to flake out on me, cancel late, or leave me hanging. A friend promised weeks ago to have me round for dinner this weekend; yesterday I texted enquiringly was Friday or Saturday better, but she this morning replied to say she is just having a quiet one this weekend and hopes I don't mind I bloody do. I had a medical emergency last year and I had to reach out for urgent overnight childcare - people stepped in when asked but having 'done their bit' returned to their families (naturally) but the alone-ness was really highlighted to me, as I took to my bed after a night in A&E while putting the kids in front of a DVD.
I've dated a bit and not found anyone special. Or special enough. Or who made me feel special. The hunt continues, with increasing apathy. All this effort!
Since being suddenly single, I invest more time in planning my time but it is often in a vacuum. I've gone to singles dinners, Meetup hikes, and hobby groups. I bring friends together and am congratulated on being a great organiser and host. I haven't been asked back to anyone else's since the end of December 
Tomorrow after I sleep off tonight's wine hangover, I might go to the gym, buy the newspapers and watch Say Yes to the Dress. Or I might not. Nobody will check in with me and on Monday at work we will all ask each other how our weekend was.
I've checked the cinema listings and the weather forecast. I don't need my roots touched up. I've laundered all the sheets. If I don't fill my time, I end up feeling dismayed and let down and disappointed. I've had a monster week at work so I've had a takeaway and a bottle of wine.
Solitude doesn't really suit me, my spirits get low, and I am lucky that I have my workplace to keep me energised. But I would love to have another adult AVAILABLE to me (who isn't my mother) to good-humouredly take an active interest. I just feel ignored.
If I wasn't so determinedly set on keeping myself chipper, active and connected, it would be really easy to just slob around, defeated and bored. I am just sick of single devoted working mum 8/14 then lonely spinster the next four days.