I agree with this.

I would also say that, in the times you say you have talked to her, you were talking about your own needs, trying to get her to be closer to you by making her feel guilty, and talking about your desperation for her company. That puts a lot of pressure on someone else and makes the relationship all about you and your needs. Usually, people want to be friends with someone because that person has something to offer, makes them feel happy, gives them a good laugh, and makes fun company for various outings. I'm sure that you have a lot to offer, but she may not be seeing that side of you because all you are telling her is that you are depressed without her company and you need her. That makes sense especially if you are depressed! It's just that when you come across as needy or negative a lot of the time, it can push people away. It seems that this particular friend has already made it clear that she is no longer interested in the friendship (at least at this time). If you have other co-workers or acquaintances who are more open to you, perhaps you could try forming friendships with them by trying to talk about more positive subjects, asking more questions aboit them and their interests, or other things that you have in common. The less needy you seem, the more you might attract others to you.