<human>: Condense the text into a few key points

I've been with my SO for a few years now, off and on. It's been a fairly toxic relationship and neither of us appear to have the tools anymore to love one another the way we both want. She's always been someone I get along with quite well, but intimacy and affection was always our #1 issue (her way more than me). Resentment built up, things explode and here we are.

Now shes moving out in a month or so. We sleep in separate bedrooms. The breakup is mutual but shes taking it 10x easier than me. She's being flirty one moment then distant and removed the next. Going out drinking a few nights a week then telling me this is the hardest thing ever. It's seriously fucking with my emotions.

I want to remain civil so we can have a friendship down the line, but right now it is so damn hard. How do I act properly at this point in time? It's hard to imagine a day where I don't see her face, but at the same time I know she doesn't love me the same anymore and each day I see her is a reminder of that and would rather have her gone. 

How do I be somewhat cold to protect myself, yet friendly and positive to avoid poisoning my outlook and moving forward?
<bot>: GF of 5 years is moving out. She's been acting like everything is fantastic. Going out. Being friendly and flirty around the house still. How do I act/proceed/remove myself from this?