I feel so guilty (cognitive dissonance)?

I want to be perfect, and that includes being the perfect daughter. I know its impossible but I'm trying to do my best. The problem is that now I've gone off to college, and I feel guilty doing anything or experimenting with anything I think my parents would disprove of. I feel so conflicted, I want to live life and get out there and try new things, but I feel bad because I love my parents so much and they gave me so much. :/ How do I make these really strong feelings of guilt go away and decide more things for myself?