Bee, if you're the one who did the betraying, then you're asking of people here something they can't give. You want their answers to stand in as the answer from the one who was betrayed. It doesn't work that way. Only that person can answer your question.
For what it's worth, though, with me, betrayal would ruin forever any hope of an intimate, loving, trusting relationship. I could continue to have a relationship of some sort with the person, perhaps even still dating or sleeping with them if I so chose, but it would be from a new perspective in which I view them as useful to fill a need for company when I want it, but to be kept behind an impenetrable wall emotionally and watched warily for indications of further manipulation or deceit. If we were living together, that would of course end immediately.
Could true repentance be defined as crying every second of the day cuz you feel horrible that you destroyed the one true thing that you ever had in your life, all for absolutely nothing????
Nah. That's just feeling sorry for yourself. Has nothing to do with repentance.
"I just want to start over again." - Murderer Justin Pendleton to the detective, in Murder By Numbers, after his plan unravels and he gets caught.
The Moving Finger writes; and, having writ,
Moves on: nor all your piety nor wit
Shall lure it back to cancel half a line,
Nor all your tears wash out a word of it.