My issue is this; If I express any decent amount of problem with it, she won't go. And I don't want her to do that. She loves her job and the whole working with kids thing is very important to her. Thing is, like you say... I sacrifice left, right and centre.
Your issue is that through your actions you show her that you care about her, you are validating her, in return like any other woman would do, she sees in you a nice provider, rest assured though, this does not imply she will stick with you for the rest of your life. Until she finds something better, with more money, more interesting, etc.
If you express her some concerns, she will think twice about the relationship. You need a whole new approach to this whole thing.
Best thing in your situation is to cool it down. Cool down the attention before she goes. Message her couple of times when she is out there working, not on her cruise. Don't tell her you miss her, don't validate her, say you miss me too. Meanwhile, starting right away, spin plates. There are better women out there, more hot, more respecting, more everything. But your approach to this is bad, you are a high value man financially, but you play it as low value beta, traveling far, sacrificing your well being. You need to have a better approach, otherwise later down the life, when you are rich finally, there is going to be a divorce, you will suffer.
Think about it, this is your 2nd post on this issue. First your girlfriend brought it up to you softly that she wanted to go to amsterbam to fvck, now she is going to a cruise with your innocent grandparents, and then to work care for children.
My man, your girlfriend wants a good vacation this summer without you around, for 5 weeks she will have a lot of fun, meet a lot of men and new friends, have a lot of sex, and just have a blast. Your feeling are not counted. You are not counted. She wants this experience without you.
Stop being a pvssy. That's the way women are. She lost interest in you, well other than that of a potential provider type, for now anyway. Why dump your ass right away if she can keep you around, providing her.
You are done with this girl, stop making posts about this sh1tty situation, find other women. I would highly suggest you this channel, internalize some of this stuff before your next post or your next move with this manipulative disrespecting girl -
https://www.youtube.com/channel/UC0it1cu-mt_IcvLTQ4CWcHw/videos Stop seeing yourself and your situation as different from the rest of the world, you're nothing special, your situation is carbon copy of other similar situations. Relax, take a deep breath, realize she lost interest in you, she letting you down easy.