I am so sorry this happened to you OP.
Some practical thoughts following your last message.
In terms of offence, there is the offence of rape, and also potentially the offence of emotional abuse. There have been convictions for actions of this sort globally, but they are admittedly very rare. Often this type of behaviour takes the form of ‘stealthing’ , where the man removes the condom during sex without the woman or other man’s knowledge. Even then it is hard to prove. Sadly sexual offences, especially where there was no violence - which doesn’t minimise at all what happened here - are hard to pursue.
In terms of police contact, you can report it to them. They would interview you - you would be able to have a friend or family member with you under normal circumstances, I don’t know if covid affects that. If you thought that he might do it again, to you or someone else, then it may be worth doing this in order that he’s on their radar and a future allegation may be taken more seriously in that light. It would also support you if you were in due course to apply for an order to stop him contacting you. However, arguably - from a police perspective - the purpose of reporting is so that action can be taken against the offender.
The police would consider whether to take it further, including whether to question him. This could make him realise the enormity of what he has done to you. The decision would then be with the police and CPS on next steps.
You might want to consider a call or email chat with a charity specialising in sexual or domestic abuse, such as the National Centre for Domestic Violence. They can advise you on options, and can help you with some next steps potentially - such as if you wanted detail on what would happen with the police, or if you wanted their help in securing some form of no-contact order.
I hope this helps. Once again, I am so sorry OP.