LOL my current boyfriend didn't call me or text me for 6 days after our first date, on which he told me he was falling for me etc. Etc. Later down the line I asked him why he would do such a cruel thing to such a sweet girl with a huge crush on him and he replied that he felt text messaging would not be "personal" enough and regaurding the phone calls he said "I was waiting for you to call me!"
Men are mysterious creatures! LOL I wouldn't worry too much about it