4 Sometimes no words are needed, sometimes, but not in your case. You both have already understood, that you love eachother, so all "non verbal" part is over. You both see that ones you are together, or just near each other, you feel the same thing, people call affection. Now it has come to the words, here is when you need to speak out. Don't just come up to him and say it, but find out a moment when you think you will fill most comfortable (just don't drag out with that), and do it. Well, my favourite way of action in this case, is to make HER say it :). So just find a way to leave alone with him, invite him to some friends party or smth, wear your best dress (the sexiest shit you got, baby :)) and he WILL tell you what lies on his heart :)
1 just tell him!