Include how you help and comfort each other. You can either say these things to your parents, or just keep the list in your pocket for yourself. If they are destructive parents, it's best to keep it short and simple and not stick around. Stand firm in your decision and move on. They want the best for their young adults.
Most parents have as their primary concern the wellbeing of the young woman in their family.
For the older generation it seems easier for the relationship to end if it's not a marriage. The negative reaction might come from fear or love and the desire to protect. Let them know that you still care about them even if they don't respect your choice. Sue Johnston was interviewed by Sierra Filucci, ChickClick's relationships editor. Some states recognize ceremony-free marriages.