[Always *]

I guess you have to ask yourself if your fear of your parents anger will overrule your liking of this boy.
If you truly believe it's important enough to risk that then I guess you have to ask if you want to ask for permission or if you want to tell them this is what you're planning to do.

I suggest 2 options here because asking permission suggests you are willing to hear no. If you simply say "mom, dad, I like this guy, and I know you don't want me to date, but I believe I am ready for this. I have proven myself mature and responsible in (these ways). Additionally, when it comes to relationship specific concerns I do not plan to become intimate with a boy any time soon. I really like this boy and would appreciate it if you would give us a chance. I am willing to invite him over for dinner and allow you to meet his parents to address additional concerns"