I am so sorry you are struggling. But I don’t think it matters if he is depressed or not. He might have 100 reasons to not want to continue with relationship. If he doesn’t want to be with you, he doesn’t. It doesn’t matter why.

Why do you worry that he moved on? If you two aren’t a couple anymore it’s for the best if you two move on. I know it’s tough but all you can do is to move on and find someone who wants to be with you. Heal and move on

PS I was a bit surprised you were cleaning his house. What for? If you two didn’t live together it was uncalled for. You aren’t his maid. He could hire cleaning lady. Also if someone doesn’t want to continue with relationship it doesn’t matter what you do. If people want to end it, they will.