How can he be happy if

[UPSandFedEx]

In August due to an argument I had with his sister he and I started having problems. A month ago he told me he loves me but isn't in love with me and in order to be fair to both of us thought we should end it. Ok I don't want to be with someone who isn't in love with me. We have been friends for 20+ years so we said we would maintain the friendship. I found out two weeks he is dating someone in her early 30's and that means there is a 17 year difference in their age. He told me how happy he is with her and I admit he looks happier than I remember him being in a long time. Well Tuesday when he stopped by for coffee(15-20 mins max) like he has done every Tuesday for 20 years he said he loves me and is sorry he isn't in love me yea I get that. Like always he hugged me before he left for work and said he had to go or else we would end up in bed together. I told him to go to work Ok how can he be that happy and say that to me? I really think this girl is nothing but a rebound thing and maybe midlife crisis. The age difference and the fact she lives over an hour from him and I know he isn't about to make that drive every weekend since he doesn't really like going anywhere on the weekend since he is on the road so much during the week. No I am not hoping he wants to get back together I don't think I can do that again with him. I am just really wondering what he is thinking