I really fucked up, is my IB career over before it even started

I am a student currently trying to recruit for investment banking and I think I have made one of the biggest mistakes of my life.

I was seeing this guy whose dad owns a major chemical company. He goes to a wealthy private university in his country (similar to somewhere like Regent’s, Hatfield at Durham, or Williams College or WashU in the US) and is friends with some extremely wealthy people, including the son of a huge mining company CEO (the kind of company everyone here would recognise). He invited me to his apartment for drinks with a few friends, five of us in total. We went there because most of us, including me and him, are under the legal drinking age in that country. Only one of his friends was old enough to drink legally.

We had one-litre bottles of vodka and brandy and a 500ml bottle of baijiu. I ended up drinking by far the most and got far too drunk, more than I ever have before. I do not remember much of the night, but from what he told me afterwards, I acted very badly, in a way I would never behave sober. His staff had to help me get home. I only realised how badly I had behaved because I saw that I had sent him a voice message while his driver was taking me back to where I was staying (I was still really drunk when I sent it and do not even properly remember doing it, but I was apologising). The next day, while I was waiting in the lobby of his apartment building to collect my things, he texted me explaining what I had done. When he came down, he just handed me my stuff, barely spoke to me, and then blocked me straight after. Because of how quickly it all happened, I did not really have the chance to apologise properly.

This all happened in a completely different region from where I am recruiting, but I still feel sick about it. I feel genuinely awful about both my behaviour and how it caused the breakup. I regret everything deeply and believe I deserve the consequences of my actions. I just keep wondering if this mistake means my chances of breaking into investment banking are effectively over before they even began.

I cannot stop thinking about it and I hate that my own stupidity has hurt someone I cared about. I am not looking for excuses, only some perspective on whether this could follow me or if I can move forward and rebuild from it.