Smothering, is he back?

Hi guys. Long distance relationship. In December my partner has mental breakdown- he said it. He said it's nothing to do with me, I'm amazing etc. I was texting him sometimes how is he, how is my day etc. He never wanted to talk about it. Last week I texted him that I'm going for wedding and we'll stay in his city. He was angry and texted me that he tried tell me that I was smothering him, and he can do this anymore. I was in shock as he never ever mentioned about it, never said anything to me, if we had proper conversation I would change something! I was so angry with him. Is he back to me? Or it's over? Since we are together he never said anything bad about me, only that I'm amazing how lucky he is. I don't get it. He doesn't want to speak with me. I stopped texting him, calling. I regret that I didn't stop in December but he didn't say that was me. I thought that he is tired with job etc.
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Maybe more details. Before Christmas he said to me that he is exhausted and needs breath. I asked him: what do you mean? He was angry and said: you know what I mean. After 2 days he texted me: If you need me text me. After two weeks time we chat and he said: I'm in bad place, not your fault, you are amazing. So I thought that he is depressed. I was sending him emails, texts whats going on, that I think about him etc. I was trying to be supportive.
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Last week I emailed him that I booked hotel in his city as friend has a wedding. He get mad and texted me: I tried to tell you that you were smothering me and now you doing this. I can't do this. I'm sorry. That's it. I get mad. I emailed him so is it over? Why I don't deserve proper phone call? No reply. Whole story. I don't understand guys, I don't.
Smothering, is he back?
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