Staying friends with an ex is a nice theory but I do wonder how it plays out in real life. Jealousy can be a thing. I know that I've seen that with my own GF who is visibly bothered any time that on of the others I've dated / been involved with cross her radar.
If you can do it with Jack that's all well and good as long as it's not some sort of hook to something deeper for either of you.
On BD H52, W50 T27, M26 S21, D23 BD-9-Mar-16 D-15-Jan-18 Final-19-Apr-18 I am a storyteller. The story may do you no good. But a story is never for the listener. It is always for the one who tells