I need some advice, I think my friend won't talk to me again and it's affecting me

I met a guy online around February and at first we became really close. We started talking pretty much every day, sometimes for hours and we would tell each other about our days and random things going on in our lives. Over time, I got quite emotionally attached to him probably more than I realized at the time. We also had this silly ongoing game which became a big part of our conversations. It was originally just something fun and stupid that we both enjoyed and I started putting a lot of thought into it because I genuinely liked talking to him and spending time with him, I never really enjoyed the game tbh, I only played it because I really love talking to him. ( One of the reasons I got so attached to him is that I've never had a guy friend before and also I've never been in a relationship, he used to say things at the beginning like you mean the world to me and that stuff, no one has ever told me that so I might have misunderstood it and that made me feel a bit attached to him)

For several months, we were talking constantly. Then around June, right after he finished his A-levels things gradually changed. He became much more distant and started replying less and less. Eventually, we went from talking every day for hours to barely talking at all. That affected me a lot because I had gotten used to having him around and had started seeing him as someone very important to me. There were also times when I would tell him personal or emotional things that I probably shouldn't have shared so quickly and I also became very confused because sometimes I would tell him I couldn't do something or that I wanted to stop then change my mind later. I was embarrassed about how much I had told him and worried that I had made things uncomfortable.

He later had some things going on in his own life, saying he was busy(whenever I text him to check on him he leaves me on delivered for 24 hours and then he replies and leaves me on delivered again and so on, back when we were talking daily he used to reply really fast) and he apologised for not keeping in contact. I appreciated the apology but I wasn't really convinced that things were going back to how they used to be. I still felt like I was the one emotionally holding onto the friendship more than he was.

More recently, we started talking again a little, including joking around about that game.

And after a week of no contact, he texted me last Friday and that time there was a huge fight between my parents and they both left the house I was so depressed and I needed to talk to someone so I told him about the situation he didn't respond for 20 minutes while being online so i kept apologising about it a lot and now I'm really embarrassed of what I've done, I should have calmed down before replying. And I feel like he won't talk to me again and it's affecting me because I was the one who always reached out and then when he did, I told him that and I texted him again the next day apologising about everything but he seemed so cold

So now I'm basically trying to figure out what actually happened, whether I became too emotionally dependent on this person, whether the friendship naturally changed and I have been blaming myself for it. That's why I'm asking for an outside perspective, thank you in advance