Should i be concerned?

So in December of 2018, My husband of 15 years kept searching this one chick up on FB multiple times a day...EVERYDAY. I brought it up t him asked who she was nicely of course. He got extremly angry. At first saying he did not who she was...than said she was friends with his cousin. Than said "YOU THINK I WANNA SCREW HER...DON'T YOU??" I was heavy hearted and upset he reacted in such a way i said nothing... After that she no longer appeared in his FB search history.

Last night we were watching a video and a notification came up from her she replied to his post... He did not look at the notification while I was sitting there. So I hopped on his phone he wished her happy birthday she replied saying "Thank You! :)"

So this morning I look he deleted the notification of her reply frm facebook...

So I brought it up to him...once again he got angry said aybe we should split up as these things I do used to be a little bit of annoyance are now a HUGE annoyance to him. He told me he feels like he is walking on eggshells and I do not see how he is free to say what he wants...hang with his friends with no beef from me go to work I don't care. I just don't understand....

His words are circling in my brain and I cannot talk to him as he gets very very very very angry.....

Should I be concerned?