Newlywed and Discouraged

I have been married for 3 months to the most wonderful man I have ever met.  However, he has changed drastically since the wedding.  In just 3 months, I have gone from being the best thing ever to feeling like he doesn't love me like he use to before the marriage.  My husband is 53 and extremely ADHD.  I am a teacher and I know what ADHD is in middle school children but I'm not sure how to handle it in a marriage.   I tell him he acts bored with me -- because it feels that way.  How can I avoid this abandonment feeling?  He says I get on his nerves asking him for reassurance repeatedly.  But he's changed so much, I've gotten paranoid.   Help!