I’m giving up on my marriage

I tried asking him what’s he hiding on his phone and he won’t tell me I begged for him to tell me and his answer is always nothing nothing .. I know clearly that’s he’s hiding something I’m ready to just end things at this point I just want to know what’s he hiding? Idc what .. just want the truthhhhhh but he’s not telling me he always has his phone with him at allll times and I know my husband how he acts and when something is changing he’s always asking me are you mad? Allll the time. I want to be happy that’s all.