When you meet someone in a coffee shop to say goodbye, as friends or lovers or family
and you know you are far more emotional because this goodbye has no time limit,

1)get a larger drink than the person you are saying goodbye to, sip slow, look at them and take it in. how their eyes wrinkle when they laugh, how their eyes keep looking at you and away because they don't want to sit for too long because they've known you and they know you could cry at any moment

2) when they finish their drink, you will still have some left
they shall get up 'well i better be going' to make it seem less permanent  
you will both smile and say you'll keep in touch. Keep talking to stop from looking sad cause you know you won't  

3) say 'i still have some of my tea' implying you will stay behind

4)hug and exchange really sweet words. Now, because you are sentimental you will want to cry there and then.

5)DO NOT!!

6)This had been a long time coming

7)they will walk away

8)you will take a breath, sit back down

9)it's ok that your eyes are so teary you can barely see your mug of tea
it's ok that the couple next to you are looking at you

10)give yourself some time before you leave the coffee shop.