I KNOW HES LYING! But is he cheating and HOW CAN I PROVE IT??!!!!!?

K so here's whats going on.....So I catch my husband in little stupid, pointless lies ALL THE TIME and I do mean ALL the time, like every other day, anyway.. He lies to me sooo much about things that seem to me to be just ridiculous! But the one of the big ones is this one..So I was going through some cupboards in the laundry room to get rid of some junk and came across a box of some old files, I open it up and wow to my sup-rise...! Now honestly I could care less about the (I am pretty hot :) it doesn't threaten me at all! But what does bother me is the fact that it was hidden! So I brought it to his attention and he lied STRAIGHT TO MY FACE, said I was crazy, he knew nothing about it and so on. So I left it alone, but a couple weeks later he gets drunk and tells me yes he was to the , but when asked when sober, its a firm NO. So I put it in a diff spot, just to see what will happen, wait a couple weeks, and low an behold, its back in the same place :) caught him! But no, he still lied!!! Like he didn't know he was busted! Then to make matters worse, he gives me this long speech on how is unethical and wrong in the eyes of God...Hes amazing lol. So if is so horrible (which he tryed desperately to make it sound) then how horrible is he?! He lies to me all the time about where he is going..example.. HIM"babe I am going to the store, be back in 25" ME"K get me some juice". . . . .2 hours later he arrives. . .ME"what happened, thought you where going to the store?" HIM "O ya stopped at Ray's got side tracked, sorry" ME "wheres my juice?" HIM"sh*it sorry I forgot"... conversation over. 2weeks later hes talking to his brother an it comes out that he did not only go to Ray's but stopped 3 other places! He will tell me hes working from 2pm-4am which he does, but nobody knows where he is from 11:30pm-1:00am!!! Things like this all the time!!! We have been together for 9years married for 1, 2 great kids, good jobs, no money troubles, a few times a week, I've kept myself looking y... I just dont know what to think. I mean theres no obvious reason (that I can see anyway) that he would have to go astry! What do you all think? Do I have a cheater on my hands or just a pathological lire??! Please honest opinions only, nothing Sugar coated!!! Thanks :)