Is there no end to the lying and half truths?

My husband just seems to be unable to tell the whole truth or even part of it sometimes and it really gets to me. (He didnt used to be like this or at least not as bad but hes been under a lot of stress from job changes and deaths in the family this year and it seems to have made things worse)

Of course then he gets mad when I don't believe him when he tells me something important. Is this something I am just going to have to learn to live with if we stay together? I know that people with ADHD do have trouble with this issue sometimes, but I just don't know how to deal with it. Any suggestions? I'm tired of not being able to trust him anymore.