Seeing someone with depression

Hi, i’m going to make this brief as possible. I’ve been talking to this guy for two months. We were mural friends before hand for four years. We reconnected two month ago, we went from catching up to being on phone for three hours and talking every day FaceTime every day. Mind you I never thought in 1 million years I would see myself with this guy. A month and to talking, we discussed our needs, and it seemed as if we were on the same page. We wanted to take things day by day, he warned me that he suffers with depression.(mind you I have dated someone with depression however this is long-distance term) And that there will be days where he will not want to talk, regardless that we were going to be there for each other through our highest and lowest. One thing is I have never felt such a strong connection with a guy since my ex 5 years ago, this is my first. In that moment I felt like I found my happiness. Until things change this past week. He had a crazy busy schedule where we were not able to talk every day which was totally fine I never got upset over that. He was very communicative! And I’m not so sure if that potentially overwhelmed him to lead to discussing about us. He told me that he can’t see himself committing to a relationship with me at the moment until he finds himself. He feels very unworthy, and not mentally stable enough to be in a relationship. I was very confused and lost because this was out of no where. Before all of us he had mentioned that he sees a future with me. And of course the one time I decided to put my guard down and allow myself to accept it. I told him that I’m fighting for him and that I will be waiting. We wanted to still talk every day but I felt like it wasn’t safe for both of us as our feelings would grow stronger. Now I need advice as in do you think talking every day is a good idea? I don’t know how our communication can still be there but not every day. Also I was supposed to see him this upcoming weekend but total change of plans he wants to come see me in a few weeks. I guess what I’m trying to ask is how can I maintain a friendship with someone who has depression from a distance and that I like a lot. Do I let him push me away? How can I be supportive? Am I being too clingy by fighting for him? I guess with long-distance it’s very complicated but I need words of wisdom to anyone out there who has gone through this.