Need help in processing feelings

I grew very attached to this girl in my company from the last 15 months and now she is leaving for masters in Australia.

This was my first job out of college and it was a hybrid job ( like it's your wish if you wanna come to office). From the past few months I have been only working remotely.Things were fine when I was just in college, but after I left college I sort of lost contact with all my friends as all of em went their own separate ways in different cities ( none of them got placed in my company) and I started confiding and getting close to this girl. She helped me through some very dark times and I was always there for her as well.

All my colleagues of the same batch kept getting fired one by one and eventually me and her were the only ones left. We weren't explicitly dating but were pretty close to each other and sort of codependent , openly sharing our feelings with each other and telling secrets - and I sort of behenzoned her so that our friendship doesn't get spoiled ( I was playing the long game, I thought I had infinite time and she will eventually fall in love with me and confess herself/ or our friendship would grow deeper and she will set me up with someone good / the cliche if we both remain unmarried till 40 we'll marry each other shit).

But suddenly, she told me that she has decided to persue her masters abroad and will leave the country in a few months. I am having a very difficult time processing this because:

1. I feel bad about not being direct with her earlier and not making her mine

2. My job is sort of deadend ( decent pay though) and each other's support and the bakchodi we used to do kept us going

3. There is noone in my company in the +-2 years of age group, everyone is a colleague noone is a friend . I used to pull through in this job because of her only

4. I had went through tough heartbreaks in college, but I had my friends around and things to look forward to . But now I have nothing to look forward to in my current role. As it is a deadend role, it will take me like 1-2 years minimum to switch

5. I have an amazing physique with 6 pack abs and can pull any girl I want ( have done some wild shit in college ). But I am not emotionally ready to get any other girl in my life ( and unlike in college where there were literally infinite options I get zero 0 female interaction because I am sitting at home working whole day and gymming)

Any advice? I do have male friends through shared common hobbies ( like gaming and sports) but none of them can obviously replicate the emotional intimacy.

As she will be going to college again and will prolly meet a lot of ppl , I don't think she will be taking it as hard as me

TL;DR:

Got close to a girl at my first job (hybrid/remote), lost touch with old friends, colleagues kept getting fired until it was just us two). We weren’t officially dating but were super close, shared everything, and I “behenzoned” her hoping for something more in the future. Now she’s leaving for her masters in Australia and I’m struggling—regret not being direct, job feels dead-end, no friends left at work, and I feel stuck/lonely. Used to have an active social/dating life but now have zero female interaction due to WFH. Not ready to move on emotionally. Any advice?