Oh Cathy, I just want to give you a big hug. I'd love to come over and keep you company and distract you with some nonsense or other!
I'm not there yet, but I do know that like most things in life, the empty nest feeling does pass. And the bitter disappointment that you're feeling now will fade into the past. You will take your trip, visit your son, and new happy memories will be laid over these bad ones. It's not comparable as we weren't going overseas, but all my plans for last summer were shot to shit by BC, and I promised myself and the kids that I'd make it up to them this year, and I have.
Let those tears flow. You get to sulk, this is shit! When you're ready you'll stop crying. If you get stuck in the sadness, seek help.
Hang in there lovely. You're doing what you can to have a cancer free life and be there for your son for a long, long time. K xox