LamieRobertson
Not awoke
You'll just have to accept, however difficult it is, that it will never be a couple relationship. It may well be that she just doesn't fancy you, but you don't need to dig deeper to find out more 'sad news'. Each day, once you begin to accept this it will get easier, have the total willpower a day at a time, to not pursue her anymore in that way. You will only put her off further, and turn it sour by appearing a pest. But down the road, there will be someone perfect for you.
Regarding the 'just friends' thing, it may never be the same again ... you will still quietly wish it was more, and she will be wary of you or getting too close again. If too awkward after a while and you don't particularly like the job anyway, look at getting another job elsewhere.
First though, you need to deal with the depression/anxiety. Until you do this properly, you will make it less likely that you come across as attractive as a potential partner. These conditions have been suffered by a large minority of the populace at one time or another, most of whom have gone on to have fulfilling lives, so so not consider yourself odd. Your GP will get the ball rolling for you if you tell the truth of the extent and its effect on you. Once you, with help, have truly dealt with this, everything else in your life will improve for the better.
All the best.
What a kind considerate post