In reply to malc:
I was going to post a very similar thread recently. I'm not sure I can add much other than to say you're not alone. I turned 50 last year and whilst hard to take it was no way as devastating as turning 30 was.
Same as you I taught for about 20 years. Married for over 20 and two kids. I've always been a pretty miserable bastard but once I had kids, after turning 30, my mood nose dived. The last 10 to 15 years have been pretty crap.
That said once I had kids I also realised I needed money so went career. Whether that has made my life worse or better is debatable. Whether I would have been happier without kids is also debatable.
I share your lack of motivation/inspiration.
Can't be arsed with the hills - that means getting up early and long drives which I do enough of at work. Also petrol costs.
Can't be arsed climbing - haven't done it in so long i'd be too scared to enjoy it. Too much effort organising people to go with and would struggle to remember everything I would need to take.
Can't be arsed with work - roll on retirement. All smiles "Hello how are you" "I'm good, how are you" (aaaaaargh!!!!!)
Can't be arsed with the kids - after all if I hadn't had them all my money would be mine and the missus and I would be having weekends away all the time and 2 or 3 holidays a year. Smaller house - more money. No uni costs - more money. Not interested in doing anything remotely interesting - 2 Sky boxes so we can watch endless crap on a Saturday night and yes you guessed it more money. Mobile phones for the little ***** - more money. Latest designer clothes - more money.
Can't be arsed reading - i just can't concentrate and wouldn't know what to read anyway.
Can't be arsed seeking out 'new' things on TV to watch - after all there all just the bloody same anyway.
Can't be arsed exercising - what's the point I won't need it, not like I'm going to ever climb all the things I wanted to when I was younger.
That said. I, and you, have a responsibility. To ourselves, our family and the people we work with. I agree with all the suggestions so far. You might be depressed, god knows I think I've possibly been most of my life. You might just need to consider new horizons eg new job. Either way you need to take action be it exercise, new job or see a specialist.
Me. I'm f*cking off up the hills tomorrow. I'll be on my own which I don't like - it was always a social event for me. It's that or descend into sitting watching crap on TV drinking wine and eating crap. I know pretty soon there will be no way back and now is the time for action. I'll come home to the wife and kids making demands of me when all I'll want to do is have a bath, eat pizza, drink wine and sleep but that's how it's going to have to be.
Good luck with whatever you choose. I never ever thought I'd end up feeling like this. I loved life when I was in my 20's.