**if you have a boyfriend/girlfriend and u really wanna be romantic, affectionate and all that, i reckon u should still spell out ILY. since it is a very meaningful three-word-sentence. :P
him: gnyt, ily, swt dreams, etc. *in whole words*
me: GNE! haha. it means good night and everything! so we don't have to include all those other greetings. :P
him: oh okay. GNE too!