Am I Paranoid or is He Hiding Something?

I am at the end of my rope with a situation in my marriage. My husband swears I am being paranoid; I say that he does/says things that cause me to question his honesty, and it is causing problems in our marriage. As examples: He will say he is doing side work, but when I call he is not there; he is out "riding around" with the friend he is supposed to be doing side work with. Often his checks don't match the hours he works, yet he swears I am being paranoid when I ask where he really was. For a long time now, we have had an issue where he will not use his phone in the house or around myself or the kids. He will only make/take calls while he is in his car to/from work. If someone does call while he is around me, he will not take the call and let it go to voice mail. We used to have each other's account passwords. He recently changed his email password because, in his words, he was "having a fit" and now claims to not know what the password is when I ask for it. In addition to these instances, we have long had a problem with him telling lies -- small lies, big lies. He has been confronted with black-and-white evidence in some cases and still lied, telling me I'm paranoid and out of line for suspecting anything. I am at the point where I can't live like this anymore. I don't trust him and feel that he has given me 99 reasons not to....he insists that I'm paranoid and reading too much into things and just want to fight. As an aside, I always take calls with him around, he has access to my email accounts, and I have never given him any reason not to trust me -- in other words, I am always where I say I am and am pretty much an open book. So please help. Am I paranoid as he says, or do I have reason to be suspicious at this point?

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