you have to be honest. if you just avoid them or ignore them there going to get upset as well and wonder what THEY did wrong, then they might get depressed. so just tell them straight up, or at least over the phone or internet. tell them your drifting apart, you dont want to be freinds, yu dont think its going to work out, ect. be honest. if you were in there shoes i doubt youd just want soemone to ignore you
BE honest with the person. Think about it you wouldnt want someone to be ignoring you instead you would rather have them tell you face to face that you cant hang out together instead of running into the bathroom or walking right past when they say hi or something hehe
You can't? They're going to notice at some point? You could distance yourself slowly, try to do it gently, but bottom line is, they're going to notice and they're going to get hurt if they care.
basically your going to hurt them no matter what you do, so you may as well be honest