Op and others - I really feel for you, my DS goes on Sat and even though I still have 16yo DD at home, I already feel lost! He has always been quite grown up and very easy going, chatting to us lots, plus very helpful.
He has spent last 3+ weeks doing DoE, in Wales with DH and DD and now in Wales again with his school friends, so at least I am getting used to just 3 of us at meal times!
Like Op, I lost my mum earlier this year. Dad died when kids were little and I never felt I grieved properly, as I was so busy juggling life with them, plus mum was still around. So, although mum and I didn't have the best of relationships, I have still felt her loss hugely and suspect I am now grieving for both parents.
We spent the last 16 mths of her life supporting her, 70miles away, as she was housebound, then after funeral, the house sold quickly and DH and I spent weekends emptying it and I also spent time sorting out her estate.
The summer has been busy, but now I am faced with no mum 'duties' for first time in almost 2 years, my DD is going to college, so more independant, DS going to Uni.....I do work 3 days and have a labrador to walk on my days off, but still, I know I will feel the change. Unfortunately the small no of local friends I have were made through kids and have drifted away as kids got older. Although I got cards and flowers when mum died, I have only seen 1 (a neighbour) since then.
DH is telling me to start thinking about the rest of my life, but at the moment it is hard. I think I need to work through the grieving process and get used to DS being away, then start thinking about new interests next year. I am also in 50s and have the dreaded menopause, which certainly doesnt help!