Seeing your parents in your dreams means you have a lot of respect for them or you have a lot of undue stress trying to meet their expectations. Parents are first and foremost the people who care about us the most, and it is normal to dream about them time to time as we share with them a lot of experiences while younger.
Are you dreaming of the days they took you to the park and spent time playing on the open field? You are longing for the days of being taken care of.
Are you dreaming of the time when your parents spent a day at your graduation? You want your parents to be proud of your achievements.
Are you dreaming of your parents simply providing you advice? You know their advice has been valuable lessons that you remember for the rest of your life.