Re: What to do
You have 2 choices, Rose. Either you try to convince your parents that he's a good guy, will make a good husband, and a good son-in-law, and an overall good addition to your family. Have the guy meet/interact with your family. The other choice is for you to forget about the guy and move on.
Why are your parents against him? What are their concerns. If you don't know, then ask them about it. And take their concerns into considerations. Are their concerns valid? Do their concerns reflect your best interest as their daughter? Or are their concerns simply a reflection of wounded pride and ego at the thought of you daring to marry someone that was not their initial pick?