And as billy says, if you really were all that, why is he pursuing you? He should be glad to see the back of you!
But please read Lundy Bancroft's "Why Does He Do That?" because it will help immunise you against future evil viruses disguised as men.
And now he's dumped and you don't see him, please don't let him live rent-free in your head by looking at his messages. Save them as evidence without reading them. Get a trusted friend or, better still, family member to check for escalation or threats so you know whether and when to alert the police. Can you make believe you're a drug dealer and get a second phone, even a PAYG, so you don't have to see messages popping up and can give your phone to the police as evidence of need be? If you do it now, you can have all your contacts safely stored. Don't give a new number to anyone remotely connected to him or it's all to do again.
What you feel for him is more habit than live, honestly, and it will fade. The heart always lags behind the head but it will catch up. You won't always feel as wretched as this, I promise, as long as you sever all contact.
And I'd change all PINs and passwords, too. He might know enough to hack your accounts, banking or SM.