<human>: Give me the gist of the text in a nutshell

Hi reddit!

This is my first post, so bear with me...

My mother's side of the family has decided to throw a family reunion on a cruise next summer. I've only seen this side about 5 times in my lifetime. 

Sounds fun, huh?

Only thing is...I do NOT want to go. I have a fear of vomiting, so any kind of activity that vomiting is a possibility, I avoid at all costs. Yes, there is medication, as well as procedures that I can do to prevent motion sickness, but these aren't 100% failsafe. I can even get a prescription for anti-anxiety, but is it really all worth it? I wouldn't even be able to drink...I was on a small ferry the other day, and even though I took Dramamine, the first ride I felt a little funny. 

Also, I have big plans to relocate next year, where my funds should really be going to, and to be honest, who knows if I'll even have the time for the cruise?

I feel as though I have made up my mind, and decided that I will no longer participate. However, I need your help with letting my family know my decision. It obviously sounds crazy, and they won't understand. They will say, "you're being ridiculous, stop being a worrywart, it's a family reunion, why wouldn't you want to go..." And THEN I'll even be the laughing stock of the whole group, and I'm already kind of, or on my way to becoming the black sheep. I even though about taking s vacation to one of the islands the cruise will be stopping at, and we can all meet up for a day to spend time together, but I feel that the idea won't work either. 

Any advice would be great. Please try to understand my fear, as it is very different.
<bot>: got invited to a family cruise, don't want to go due to fear of vomiting, looking for advice to let family know.