Yes, I loved and lost. It wouldn't have been better not to have had the relationship, but if I had it to do over I would break it off sooner. That relationship taught me to end things if they aren't working.
It is all part and parcel of living. Less dwelling on it makes it easier to get on with life.
Yes I have . And no it would not have been better if I never loved that person. If not for that relationship, I would be missing out on a son and 5 of my grandchildren.