I'm currently working in Spain for a global company and I want to leave. Another company wants to give me the job I applied for and I will receive the offer in the coming days. My future boss told me to not resign until we have an agreement, but I'm pretty sure I'll accept the job.
My current boss who is in America right now plans to fly to Spain to meet me, as he does every year to talk about objectives and trainings. I feel bad because I don't want to let him travel so far and then tell him I'm leaving. But I don't want to tell him (or anyone else) that I'm leaving before I'm officially leaving.
What should I do?