edit: For simplicity: How to be less attractive, without being a dick or a douche.

Over time some friends and mutual acquaintances may become attracted to you. Temptations arise. Maybe even a few slip ups here and there.

Having a GF does not make a whole lot of difference in these cases. The whole "lets just be friends" talk is a slow but, eventual, end to friendships. Hooking your friends up is too much meddlesom work.

Ideas on how to not so attractive, without being a dick or douche, so to keep the friendship intact. So the thought of me breaking up or having a change of heart isn't even on their minds?