It doesn't sound like you are actually jealous and angry at this situation but at one "like" it from the past; where someone else got to do something you wanted to and you only got to look on, feeling like it should have been yours.

I would get curious (as you are) about what you wanted but did not get as a child and looking for a truer cause of your upset instead of the trigger cause, will cause a lot of the upset to go away, just like looking at a dream makes it only a dream, a symbol, and not something that feels so true and lifelike now. Looking for the incidents in your past (or could be present, with the trip you were planning with your husband) that might have made you angry and jealous will put your friends' good fortune back in the present and in their own lives.