It was abuse, because he was using fear tactics to make you do something you weren’t happy about. You said yes because you were scared of the outcome if you said no. He was already getting aggressive.
It’s disgusting what he did to you. I think
it’s a huge transgression of normal
boundaries. It’s bad enough that some men pressurise women into sleeping with them too early on, but to make their partner feel that they must sleep with someone else too and that they aren’t allowed to say no…!
You might find it helpful to call the Rape Crisis helpline, as your experience counts as sexual abuse. Don’t forget that he was the perpetrator- you were the victim. He guilt is his. He knew your vulnerabilities, and exploited them.