It’s Possible: People Explain Their Trick to Staying Friends With Their Ex
Even if you hate their guts now.
After a while, think of your ex. Now think of her (or him, depending on your gender and/or orientation) having freaky sex with someone else. Make sure you think about oral too, and wicked orgasms, no cheating.
Does that bother you, or are you happy for him/her? If you’re happy for him/her, then you are ready to be friends, providing that your ex is in the same place. (Slimpikin)
It Takes Time
I’m pretty good friends with one of mine. She actually broke up with me for my best friend. I was obviously bitter at first, but I got over it in the long run. Still best friends with the dude, and became good friends with her over time. (unicornurine)
In my (only) experience, no. But it honestly depends on the individuals and the level of passion in their relationship. My mother has remained friends with a few or her exes since her and my dad split. (Ryltarr)