Boyfriend going on overseas Buck's party with friends
I'm sorry about what may happen, but if you strongly object to him going overseas to the bachelor party then you need to tell him because what is said now while he hasn't been drinking maybe a totally different situation when he's overseas with his mates.
If I said this to my finance she wouldn't have liked the idea at all and told me not to go and for you to say no to this trip is holding him back but rules in a relationship have to be decided on and trust is always an enormous issue.
You need to see
I would discuss this and other issues with a counsellor.
Hope to hear back from you.