I'm going to tell my boyfriend not to take a 2 week vacation
What do you feel will happen? Is there something happened?
I'm tired of his shenanigans. I'm very upset with the way things are going.
I understand that his shenanigans can really bother you. But, you wouldn't want him to tell you to cancel your vacation, right? So I suggest you don't tell him either.
Should I break up with him then?
If you think your relationship with him is beyond repair and you're not happy it's alright if you want to break up with him. Make sure to have a conversation with him first.