How do i live my life happily when i have so many regrets?

You learned: If you had an abusive parent who kept bringing up mistakes you made years ago, it may be very hard to get used to the idea that mistakes can be forgiven -- by you & others. Some cbt or an rx may help u recognize why you can't let go. And having made more than your share of mistakes (as i have) is how you learn. Make amends where you can, plan to be better, talk with a spiritual guide who's decent.