You’re totally justified in feeling this way, don’t worry. He was your friend and you needed him to be there for you, and then, when you least expected it, he “abandoned” you. You have every right to feel sad and angry. I have a feeling that while you were a good friend to him during his hard times, I think he found it difficult to be there for you, for whatever reason. He said he felt “depressed”. Perhaps he has trouble helping others with their problems. No matter, that’s done with now. Whether you try to keep him as a friend or not is up to you. But now you know that he may not be the sort of friend that you would turn to when you have problems. Do you have anyone else you can turn to? If so, go to them.