Parent's divorce cause of breakup?

Divorces aren't fun, I bet he is just confused and stuff. My best advice is to just give him a little space for now but make sure he knows that your there for him if he needs some1 to talk to. And if you 2 were together for 1 and 1/2 years I doubt he stopped liking you overnight. Just give him a little time to figure out some of his problems.