How do I be the best possible person I can in this situation?

Someone I used to date who I have since learned not to trust about certain things works in the same profession that I do. He is younger than I am, (24 to my 26) He didn’t finish a year of college, whereas I completed my coursework. Has landed a job interview with a very large business everyone has heard of, which is great! The problem is he is interviewing for my dream job, and he knows it. He was offered a position at well over double what I make now. I know the person that got him the interview there, and it is definitely a believable offer.

I am trying to be as supporting and as good of a friend as I can be but he makes it difficult by rubbing it in. He even told me that they were hiring like 30 positions, and that I should talk to the guy we both know about it.

I did. He told me that there was only one position, and it wasn’t something I had experience in. Why would the other guy tell me that there were 30 open positions? To make me look like a prick?

I joked about it but it really does piss me off and I am still trying to be supportive throughout the whole process. What should I do? I want to ask him why he is being such a douche, but I don’t want to come off like one.

Does this make any sense?