My boyfriend: porn addiction or pedophile?

I went on my boyfriends computer after one day seeing a small picture icon of a naked girl when I glanced over at his computer. When I did, I found hundreds of pictures of young girls saved, bookmarked sites specifically teen and petite teens, daddy daughter porn. I found out he s a member of a teen cam girl site. I also found out he has a secret instgram account where he posts pictures of girls and sends himself pictures of what look like 14-16 year old girls in bikinis and next to nothing. I then went snooping into his stuff and found a collection of USB sticks and they were all full, no joke a f***ing million pictures and videos of young naked girls and teen porn. Half of it I would say is of age girls pretending to look young and half of it is actually high school aged girls. My boyfriend is in his 40s and I am younger than him but I didn t think he would ever be turned on by some of these pictures. I tried to talk to him about our sex life (which has never really been great) in hopes of understanding him better without having to tell him i violated his privacy. However, after telling him that I myself am a very sexual person and have needs and desires and that I watch porn. He then told me he has a low sex drive. I asked him if he masterbates a lot and he said no . A couple days later I caught him looking at these sites at 7am while he thought I was sleeping. Is that normal? I'm I losing my mind here? I know I have to talk to him about why he feels he has to lie about having an active sex drive to his partner but I'm just looking for some opinions on all of this, the extent of porn the ages of girls, the lack of effort in our sex life - well nothing compared to the attention he's given to this collection. I'm just heartbroken, any help is appreciated!