How to become friends with your ex immediately after the break up?

[Loki]

We were dating for 2 years and together for 4. I really thought he was the one. But he says he fell out of love with me about 6 months ago. He broke up with me 2 weeks ago and I am devastated. But we have been through everything together and I am the closest thing to family he has. He wants to remain friends and best friends and I want that too. But it is really hard for me because there is already another girl. They aren't officially dating but they are sleeping together and it is exclusive. We are still living together and I don't see that changing. However last night I decided to pack up and leave for a few days on a temporary basis to my parents house so I can have more distractions. The past two weeks I've done all of the crazy ex girlfriend things to try to win him back and I really need to just give up and move on. I need advice on how to handle this while still seeing him on a daily basis (because I don't plan or necessarily want to be away from my house for more than a few days). I want to grow to love myself which I can honestly say that I don't right now. I would like advice on how to do this as well. Even if its just faking it until its real.

I would prefer for people to take my wish into consideration that I don't want either one of us to just up and leave, no matter how much harder it will be. Just please if you have been through something similar, or know someone that has, and it has been successful then I would really appreciate it. No need to post unsuccessful stories. That will just make me feel worse.
I said please don't post that we should just get away from each other. It's not going to happen and you are just making me feel worse.
STOP! Please just stop with the you can't be friends bullshit. I know its possible. Please take my wish into consideration and stop with the negativity.

[Lucia]

It's just going to take time. I've been friends with my ex for three months since we broke up. Sometime I still don't feel like we are "there" yet in terms of being platonic. Sometimes we still get jealous or try to flirt, but we are getting there.

[RIcky]

You can't. It's just going to make it more difficult for you to get over him. It's going to kill you every time you see him with another girl or anything he's at a party and you're home alone thinking about it. So just don't bother with being friends. Almost every guy says "let's be friends" cuz they don't want to seem harsh or mean, but they usually don't mean it. I know this is hard to hear but it's the truth. Avoid him at all cost. Delete his number, off of Facebook or twitter. Whatever. The more you get rid of the memories the easier it will be to get over him. I don't believe in being friends with your ex. My ex and I have been broken up for 2 years and I still don't speak to him.