dont say anythin for a while then chuckle to urself
she'll hopefully say
whats so funni
then u can say
oh i was just remembering our first date in here
wen i looked at u that day u gave me butterflies and i knew that one day we'd be here like this
hope she says like what
but if she dont it doesnt matter
if she does u can say in a position where i tell you that you are my world,i love you (then get down on one knee) and i ask you if you'll make me the happiest man alive and be my wife
if she doesn't say like what
then say pause a sec and say i knew we'd be sat here with me itching to tell you that you are my world , i love you (then get down on one knee) and i ask you if you'll make me the happiest man alive and be my wife

hows that for a little idea lol lol