I think maybe your parents are living in the past and don't see who you've grown into. They just see the child, not the young adult. Or maybe they are threatened by your success and fear losing you.Whatever their reasons I am glad that you are able to objectify their reactions a little and see that you are an independent, responsible person. Hang in there and keep doing what you are doing. Once you get out on your own you'll probably feel better.
Just keep posting and let us know how you are doing.