I wanted him to be jealous but it never worked.

I’m a 25 year old lady who is dating a 30 year old man and we’ve been dating for 7 yrs now. We have a 4 year old boy he’s working I’m also have a job. My problem is He used to have facebook date club(flirting club) on his phone but he was hiding that to mi. Okay I find out that he flirting with others girls on facebook although I know nothing about these things so I’ve ask him he denied I jst tell myself that let me download this facebook thing and i told him that I also had a facebook page He ask me to remove it because its a good thing so let’s remove this together. I realise that he is still flirting so I’ve decided to download again and know I’ve got Watsup,bbm & facebook.my problem is when we watch tv evrybody is clicking phone we dnt have a good conversation bcoz we always busy on the phone we eat there’s a phone also on hand. How do I solve this problem again because I was thought I want him to be jealous but it never worked and he still continues with what he is doing.