Tell me what I am dealing with

Im new with this and would like some advice to see if I am really dating an N. I met my boyfriend through a friend about 31/2 years ago after a bad divorce. He swept me off my feet, tying up my weekends so I would only be with him, sending me flowers to work. He lived out of state then where I lived, but when I finally decided to move out on my own in an apartment, he moved also to the same state and same apartment complex.We ended up living together He was on workers comp and was home all day. He respected me that I had to work and would go to bed with me and get up every morning and make me breakfast.
Then last year I bought my house, by myself, but we still lived together and a few months after moving in to the house things started to change. I noticed he was taking his phone to the restroom more and he was always on the computer. The nights before, he would make all these jesters that he was going to do all this work around the house the next day. He at this time had stopped getting up with me, and was sleeping 1/2 the day. I would come home to expect us to have quality time together for the evening to find nothing was done he said he was going to do, he had stop making dinner for us. I would ask what he did all day, he said he couldnt get his body woke up. I would find out he had been on the computer all day.
When I question him about why the changes or why he cant remain in the bed at night, his response would be I cant sleep my body hurts. He would tell me I didnt care anything about his health issues. Over the summer we would have my daughter over to enjoy the pool,cause he wanted to grill out, well instead of enjoying the pool he was sneaking off to get on the computer.
It has become to the point now that what ever anyone else in my family says, if he does not like it, I am the one he is blaming cause I did not tell them to stop.
There are more issues, alot to discuss. Please could someone tell me I'm I dealing with an N?