What is goin on with my bf?

at 1st everything was perfect it seemed like we had no problems at all we have everything in common and we luv spendin time together it feels like weve known each other for a lifetime we've even talked about a future together for our 1 month anniversary he went all out. he spent ALOT of money on me and everything. but lately, i feel like things arent like they used to be. we dont talk 2 each other as much, he doesnt say i luv u as much at 1st anymore. i jus feel like things arent the same. although we still love each other, the other day he went 2 days without talkin to me. i called him but he never returned my calls. he finally called and his excuse was that he was busy wit work and he had alot of family problems and he said he was sorry and jus cuz he didnt call didnt mean he wasnt thinkin bout me,but still to me thats no excuse. i dont get it, how could we go from being so perfect to this? im startin to feel like im initiating everything. i havent changed at all. whats goin on?