Why didn't he tell me

I was with a man for six years ,during that time I thought we had a normal happy life. I did not realise he had a whole other life he lead without me. I feel betrayed and now left for dead on the side of the road like acting animal.
I thought it was the best thing that has ever happened to me. He seemed kind,honest a good worker. He so wanted to do things differently . Sadly that's not how he decided to live his life. It became a Web of Lies, deceit. He can no longer take it, he finally snapped not even realizing the things he was doing.

It started with a pain in his head, the pain has become so intense that it can no longer function.
He started saying things doing things without even realizing it. He actually sat there told me he wasn't drinking, when I asked why he had two glasses of water in front of him. His response was but I told him to drink extra water. I asked why he was taking a sip out of one and then the second one. He said so they go down at the same time. I asked why didn't you just use a larger glass. His response was I was a pain in his arse.
Then it started I went away to visit my friend. I called every day no response. I thought some thing horrid had happened. Finally the night before I was to come home he finally responded on a skype . A drink in his hand , a dog collar around his neck and a rather large dildo in his other hand. Never asked how I was, where I was anything. He jumped on the couch swatted down on that dildo and rode it like a pro. Now don't get me wrong I have no problems with what people do privately in their home; nor toys they use. My issue is he was drank, never told me he liked these things. This should have been shared when we started our relationship. Part two to come...........................