I know I'm probably just inviting people to bash me with this post but hear me out.

I split up with my first LTR almost a year ago and got absolutely shattered by it, she went off and fucked a bunch of guys and I waddled around feeling sorry for myself and was just depressed for months. Eventually I found TheRedPill and it encouraged me to get off my ass and start doing shit for myself and not let some little blonde bitch control my life.

I've taken much of the lessons to heart, I lift almost every single day and have made staggering improvements, I have a sick internship that's highly prestigious and pays out the ass, I've got much better style sense then I used to and I've noticed my confidence steadily get better and better.

Last weekend, I went on a weekend get away with a couple of buddies and I knew there was a good chance she'd end up being around a lot (Same social group). During the weekend, I found about about 2 more guys she's slept with and she was just generally being kinda bitchy towards me, I wasn't being flirty or anything just civil and calm.

We had like one little moment talking to each other when we got real with one another for a minute and both admitted that we still have feelings for each other (I know, Red Pill mentality should be to not have emotional reactions but fuck off, I'm human).

Anyway, on the drive home I felt so shitty, I felt the same sets of feelings I did almost a year ago when we split up.

What my question is, or what I'm looking for advice on is for anybody on here that's been in a serious relationship that ended poorly and has to be in contact with their Ex from time to time, how do you deal with lingering emotions/attachment that comes up when you interact with them.

I know people are already probably typing out stuff like "Man up, don't be a bitch about it" or "Go fuck 20 other girls and you won't care". I'm not looking for that advice, I'm already fully aware that I'm probably being a pussy about it and that smashing other girls would help the problem. What I'm looking for is strategies or advice on keeping old emotions tamed since even if you're hardcore Red Pill, you probably still understand emotions can be crazy powerful given the right trigger.

TL;DR

What are some strategies to help deal with an Ex when you have to interact with them on occasion and how do you avoid having old emotions re-surface.