Bill fell in love with a picture of hers from over seventy years ago and he seems to be another version of the man she once cared, suggesting that Bradbury shares Helen's romantic vision of love. However, Tom's statement that what they had was a happy ending shows that what they had was already complete. For a ninety-five year old woman like Helen Loomis nothing could have been better than meeting Bill Forrester, and from her Bill learned many things, but most importantly that he must find a woman before it is too late. It is not necessarily bad if he does not marry, but if he does not he can be assured later in life of finding a younger Helen Loomis, and that might be tragic. Life is not always easy, and it may be that finding true love is difficult. Just because it did not last does not mean what Bill and Helen shared was not important.
Charlie brings up the Lonely One, and it is interesting the way the kids quickly move on from something as abstract and difficult to pin down as true love and happy endings to something much more concrete. The evil force that scares everyone, the Lonely One is much more in the consciousness of these young children than true love.