A lot of Porn.

My Boyfriend and I have been together for almost 5 years, we live together and have a very good sex life, recently tho I started to notice that our daily data usage started to get higher so I took a look through his search history because I know he likes to watch music videos on YouTube so I wanted to check if that was the reason but all I found was a LOT of porn sights watched at the same time every day, then on Monday I was having trouble sleeping and woke up and caught him laying on the ground watching porn playing with himself. The same thing happened all week. 😢 I caught him actually getting out of bed and getting on the ground to do it. It worries me because I don't understand why it makes me so angry and upset. Any thoughts????