I don't know where you live, so you will need to talk to the people who present your Post sessions. One couple in our group had the wife videotape each post session and then watch it at home with her husband, because he worked weekends. They said that worked very well. Also, our group said you can always repeat a Post session the next time it is offered by just contacting them to know when it will be. I'm sure you will find a way to overcome the problem.
My husband and I got the spark back at the Retrouvaille weekend too. It seems like such a miracle, but it really works. Can't say why exactly. It sounds to me like your husband does really want to be with you, but you suffer from negative thinking. We all do that to some extent. This will help you to get over that.
Please post after your weekend so we know how it goes for you. I think you will be very happy with the results.