I hear you. Myself, I tend to fall for coworkers, which never never works out well. Because it generally isn't appropriate to try and get a relationship going with a coworker (or even worse your boss), it generally stays in the unrequited phase, which is just miserable. And because of the attachment, and the fact that you can't really cut the person out of your life and move on, it's like continually poking a wound. Over. And over. And over. Every. Single. Day.
If they're leaving, then there's not much you can do about that. You can tell them how you feel, but they may need to leave anyway. Or you can stay amicable but platonic, and try to move on once they've left. There are millions upon millions of wonderful people out there, and there will be someone else who is right for you and who isn't leaving. It's just hard to see that when they're still here and the attachment is still new and strong.
