Mixed feelings making me feel overwhelmed

So I am in my final semester of college. Well technically 2nd last, but our last semester is usually off campus so for all intents and purposes this is the last. And it's just getting me so fucking overwhelmed. My friends and I stay off campus. In the last 3 years made lots of friends, did lots of stupid shit, and had a fun time, but in the grand scheme of things, I didn't do well in college atleast not academically, did not pursue the sports I wanted to do, did not do any extracurriculars and I'm graduating without a job lined up. So basically I just smoked and drank my way through the 4 years with no plan. Yes in the moment, and even when I look back I wouldn't say I regretted any of the things I did. But maybe I could've prioritised better. Yesterday I went after almost a year to the extended part of campus where all the dorms are and seeing all the juniors there with glee in their eyes made me a little emotional. There were also try outs for different sports teams going on as it's the starting part of the year where recruitments happen and seeing that it hit me even harder that I literally haven't done anything in the past 4 years apart from smoking and drinking. Although I didn't do it to the extremes where I was failing, and have passed all my courses. But it still hurts. Also this is the time where I finally started liking a girl. Like I did date back in the first 2 years as well but none of those panned out into a relationship and now that I started liking someone, it's time to leave college. And we probably won't even see each other ever again. And getting all these feelings while also preparing for job interviews and tests, along with with college assignments and everything. It really screwed up my mental that fuck this is it, finally entering the real world. And doing all this, it's also like we need to party hard as well cause it's the last semester and we won't be able to live our college lives ever again. Nobody told me this when I entered college. And especially for this semester where we're trying to manage job prep, plus college stuff plus partying like no tomorrow plus leaving college plus meeting some of these people for probably the last time in my life (especially this one girl). It's just fucking overwhelming all in all.