Sorry to hear of your loss. It gets harder to make new friends the older we get.
You might want to consider reading my new book, “Hidden in Plain Sight: How Men’s Fears of Women Shape Their Intimate Relationships,” which has a good deal more detail on the subject of men’s loneliness.
I’ve also set up a Facebook page where people can talk about these issues. I hope you will consider reposting your comment there so that others can see it and respond.