Hey SkysBlue...
I really admire your courage and steadfast friendship in being with your friend as she enters this phase of her life. I hope you can also look at this time as a very treasured gift that you two will share together. Being with someone and witnessing their courage and being able to laugh and cry and be there for each other as you say your "see you laters" will be something that you will never forget and lessons that you will cherish forever. I'm sure you have probably already read some of Elisabeth Kubler-Ross's stuff, but
On Death and Dying which I believe may have been one of her last, was truly beautiful in terms of cherishing these types of moments and the presence, wisdom and love that is shared. I'm so sorry that your T is not here to share these moments and support you, but I'll bet you'll actually be quite strong and full of joy and tears and need her most when you come back and she comes home. I hope you'll keep your journal handy and write daily all that you are feeling and experiencing so you can keep it close to your heart and ready for T when she comes back...
Sweet gentle huggles for you and your friend..I'm sure the angels are watching over you both and your time together...
Wysteria Blue