How do I not miss him so much after reuniting?

Lot of things come up in our lives post reunion. Just after reuniting with one of my bparents who lives within minutes of me, I had to live through a whole year of only getting together ONE time! I remember going into that reunion thinking with the close proximity maybe we could meet for lunch once a month and build a relationship. When a year went by with only one meeting, wow - I hardly survived the disappointment. But my bparent conveyed similar feelings to what you say your bson is saying. Sure enough, now we see each other pretty regularly and talk a lot more, but sometimes big life events happen for the other party that don't pause for our reunions (things like weddings, divorces, deaths in the family, kids moving out, kids moving back in, changing jobs, etc). With your son being college age, I would bet his summer is pretty busy and his parents may need more of his time than they do during the school year. I would try to read a lot of books about reunion and journal your feelings in the mean time. I grew a lot through that strategy. I found books that validated my feelings and was given words to express myself better when our reunion picked back up. I know it's hard. I had to live through four months of ZERO communication at one point while worrying sick. If he says he wants to know you, just have faith that he does. Write him letters to keep him up to date on your life, but put them in a box for now. And post on these boards regularly - it does help! :) Best Wishes, Snoopy