<human>: I've known my friend for about 3-4 years. He was usually the one to initiate conversations. I am not sure if I would classify some of the messages as "normal" friend behaviour (ie. texts at 5AM saying he cannot sleep, asking me to call him as an alarm, etc) but I doubt he was interested.

He mentioned during one of our talks that he was preparing for a busy month. Shortly after that he went silent. Even when he found out I'm going through something tough he didn't really say anything about it other than a joke. I get that he's busy but can't help but wonder if the problem is with me?

Do you think I have done anything wrong? Or is it because he's busy? Anyone with past experiences? Sorry if this is stupid, I just hate feeling like I may have done something but am too scared to reach out because our contact has been non existent over the past two weeks.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Friend has stopped talking to me and I'm wondering if I may have done something, or simply if I need to relax!