How exactly would I go about doing this...?

I think you don't love Jessica. Because if you love someone, you wouldn't like someone else. Maybe you like Jessica more, but whatever the case is, Ariel is still on your mind. You can't have both girls. And in this case, I think you won't be able to pick one. Because at one point or another, you'll want to be with the other one for whatever the reason. Just take some apart to think. Clear out your head. Then see where that takes you.