Lost my childhood friend idk tho

so me and my frnd was from 7th we weren't back then but when we reached 9th grade we became really close frnds even tho i have many friends he was the the core one still the incident i really don't know what happened, bro was there even in my highs and low bro understands me in every aspects but recently we went on trip after that everything changed no calls no texts bro never hangouts we had christmas and new year plans so we called him he was making up all the reasons fr not to come ik cause we known eachother fr a really long tym.

so if anything happens between us it's always me who solves everything or initiate the talk so this tym i didn't even bother cause it's always me i called several times to ask him what's the issue and y aren't u not attending any and there's also another he also tried to talk to him he even went to his house to talk about it he also has an issue ig he didn't even talk to him properly he asked what's wrong and all but no proper response he was playing games in his pc didn't even bothered to stop so he left i really felt bad.

what's your opinion guys what should i do?.(sorry for the bad english or any mistakes it's my first time posting)