Sylvia, when I had counselling some months after Ray died the counselor told me anytime I felt lonely, anxious or thought a panic attack was imminent to go to where people were, the shopping centre if it was cold or wet, a park where there were people around or a beach side cafe if it was fine and sunny. I did that often at first but more rarely now. She said to fill my life with people and because of my personality to increase the volunteering work I did to keep me busy. I found all of that advice spot on for me.
I like to keep busy as keeping busy stops me from moping. I have a garden and do handwork, knitting, sewing, beading but that is part of my silent time alone. I most miss Ray's company at night about 8pm when the dinner would be over and there was time to talk. Being a long term carer meant that I was used to the fact that he was always here with me apart from hospitalizations and the occasional respite. Of course I got used to him being around and even when he could no longer hold a conversation at least I could always talk to him.
I don't think there is a solution apart from the passing of time as now, going on for five years since he died, I do feel less lonely when alone. I have filled up as much time as I can. I do do things that give me exercise as well as pleasure like gardening and going for a walk, I do have people I can invite out for coffee and the various things I do as a volunteer in my church helps to fill Sunday so the weekend does not seem too empty for me.
I hope you too find worthwhile things to do to fill in time and that you find pleasant pastimes to fill the time when you are alone.