Parents don't like girlfriend

Hello everyone, I am a senior in high school. So, about 7 months ago, my girlfriend of two years and I broke up. No one cheated on the other or was mean during the break up. Things were just ready for a bit of a break. I really loved this girl, and everyone knew it. We had grown up together. Well anyway, as time went on I realized that I did not want to lose this girl, however she was not ready to begin dating me again, which I can't blame her for. She needs to make her own decisions. However, I was very upset/depressed at this point. The people who could see my depressed state the most at this time were of course my parents (being in high school, I still live at home.) They were eager to help me move on and become the happy son they were so used to. However, now me and my old girlfriend have started to become interested with each other again. We've been talking for the last three months and it is clear that these feelings are real. However, my parents are not quite "thrilled" about this. They say I need to move on and forget her. I can't do this, I'm not ready to leave her. I should say that while we were initially dating, my parents loved her. They would never do anything to break us up, but now they just want what is best for me. I know they have good intentions but don't I need to make my own decision? Shouldn't I decide? Do you think it is a good idea to be with this girl again? If so, how can I help my parents see past their reservations and have them respect my decision? I need advice!

Hear-hear!