New Subscriber needing advice

Hi there! I’m new and need some advice. My girlfriend and I have been together for over 3 years. We met at work. Started off as friends first but we transitioned into a romantic relationship. We both love each other very much! Recently my girlfriend was presented with an opportunity to go work somewhere else. A few of her coworkers have left and gone to that other company and they want her to go as well. My girlfriend is on the fence about whether to go or not and I want to be supportive on whatever decision she makes. Here’s what I need advice on : If she decides to leave, it would make me sad and I want to know how best to process my feelings of not having her here at work. I have to say that she is my ray of sunshine and one my motivations for being at work. I love knowing that she is here. I love how she brings me coffee or food and chats with me on the IM or just shows up to my desk out of the blue to give a kiss and a hug. These little things really make my day ya know? If she leaves, I won’t have that anymore. We work in different departments. I work in IT and she works in compliance. But even if we are in different departments we have always been close even before dating. I would never discourage her not to take the other job. I would never want to hinder her in any way from doing what she feels is best for her. I just want to know how can I deal with her departure. We will still be together and our relationship will not be affected except for the 8 hours that I’m at work. And to make it even more pain staking, once she quits most likely I will be involved in her access removal being that I’m in IT. I will be disabling all of work accounts. That’s just gonna destroy me! I know this pain will be temporary. I know that I will get over her not being here at work. But while that pain is in full effect, how can I deal with this in a healthy way?