Is he ghosting or does he actually need time/space?

Hi everyone,
I just wanted some input regarding my situation. I am extremely overly sensitive so its hard for me to distinguish if i’m being irrational or if my feelings are legit.
I relocated from South Fl to Philly back in Sept. I wound up meeting an amazing man and I have been single for 7 years. I’ve been hurt so much that i rarely take chances anymore. At first I wasn’t going to give him a chance but he was very sweet and continually persistent in a non creepy way, so I agreed to go out. He was so nice that I wasn’t sure i even wanted to go out with him again. I decided that that was a stupid reason not to and gave him a second chance. I was so glad I did because we have been together ever since. We are both very empathetic and care about others feelings. He’s very sensitive for a man. We have a lot in common. We made a lot of future plans. There was never any hesitation or awkwardness when it came to us moving forward together. I spend every weekend at his house. We have never had a fight. We spent all of the holidays together. He has met my whole family. All I’ve done in the past 2 months is walk around thanking God and the Universe for knowing what it feels like to finally be happy.
A little background info. He’s 33 and both of his parents passed years ago. I know the holidays are hard for people, and I was surprised at how well he has handled the season. He seemed a bit down on NYE and I asked what was wrong and he told me that it was his mothers birthday. Of course i tried to comfort him and I stayed that night with him and all was normal seeming. I went home the next day and since then things seemed to have gone down hill. His energy totally changed. He was short in his messages and he’s been a bit distant. I called him out on it and he told me that he is sorry and that he doesn’t mean to make me feel a certain way and assured me multiple times that its not me. This past weekend was horrible. I barely heard from him. He canceled plans to come to my house. He said when he gets in a depression like this, that he doesn’t talk or text much. I get that, but he has completely shut me out the last 2 days. He wont return or even read my texts, I have had no contact. I don’t want to push him away, but i feel like maybe he wants to end things with me but is afraid of hurting my feelings. I don’t know if its intuition or insecurities that are making me feel this way. I messaged him asking if he’s ok and told him I miss him and no reply. I messaged again this morning a really sweet message and nothing.
I honestly don’t know if its me or if its him going through a major depression. I don’t want to show up at his house. I don’t want him to get mad if he needs space, nor do i want to look stupid if he is simply ghosting me. I’m so very sad. We never had one tiff or fight, this all happened within a few days.
Any advice?: Do I not message him anymore, do i keep trying? do i move on?
my heart hurts and i hate that he thinks nothing of completely ignoring me. A simple emoji would even be sufficient.

Help,
ty
JL