Hi Ashley,
Your parents feel that they know best. They don’t trust you to make the right decisions.
Being that you lack experience in so much to do with life, including relationships, your parents feel as though they have to continue protecting you and making decisions for you.
They might start thinking differently and beginning to trust you more if you were to show them a level of maturity and responsibility.
This means that you may have to start trying to take on new responsibilities in your life.
These responsibilities could vary.
A few include; taking charge of some kind of project, working a part-time job, paying a good number of your own bills, finding your own place to live, fixing problems when they arise instead of always going to them, etc.
In order to keep your relationship with this guy and also obey your parents, they need to get to the point where they feel like they can trust you and that you are capable of making the right decisions.
Oftentimes, giving yourself a lot more responsibilities and consistently keeping yourself accountable for them without looking for their help can put you in that position.