I'm a 26 year old male, and am getting into a relationship with a 20 year old female, so it's nothing huge, with that age difference, but right now, it's a big deal as she'd be a minor, and you'd be an adult... However, there can't be anything physical, depending on your area of residence...

If your feelings are true, you can wait & be patient, when it comes to the physical stuff; (Incidentally, even if parents are ok with things like that, still, refrain... Someone who has a grudge against you could easily try to make a public situation out of your activities...)