Solitude, my daughter left about 3 weeks ago now for Warwick, and I am still waiting for it to get easier.
She is settled and happy, but I still have a big hole left here at home. I haven't seen her yet, though she may be planning to pop home briefly in the next couple of weeks. It isn't set in stone yet.
I miss her hugely. I am trying not to show it to her, and to message just every few days so as not to worry her and make her feel in any way responsible for me, but it is soooo hard. I guess that having been a lone parent must make it even more poignant for you. I am not a lone parent, but I don't think my husband has the same sense of loss I do. If he does then he hides it, and tends to put on a pragmatic show, so I have to deal with it on my own.
I joined this thread a week or so ago because I needed to speak to people (especially mums) going through the same thing. Like you, I needed to know that I wasn't alone, and that my feelings were valid, which of course they are.
I understand your pain, but I am told it will get easier. I guess we all just have to work at it and give it time. I am trying to give my daughter time and space, when all I want to do really is have a good old chinwag with her and find out how it has all been going. Being a more distant part of her life now has hit me far harder than I ever thought it would, but this is inevitable.
They are no longer minors, and we have to let them move on even though we don't want to.