Can cheating be forgiven?

My boyfriend of 8 months (friends & having sex for 3 years on and off) has been cheating on me since the start. 3 times with his ex, once with a random girl from instagram. He did it all in the room we share & the one I helped him move into. Without a condom so I have to get tested. I found out because he took videos and still had them on his phone. He was also constantly messaging girls and asking to pay for FaceTime sex and asking to hangout.

I think I know this isn’t forgivable, I just don’t want to accept it.