Cut him off, you don’t need that in your life. You don’t owe anyone an explanation for anything, my best friend is going through something very similar and I told her the same thing. Before I knew what was going on, I gave her space and time she needed and she told me the truth when she was ready, you don’t owe anyone more than “I have a lot going on, I’ll check in when I can” in order to get the respect and understanding you deserve.