I want your opinions about my close friend?

i got a close friend we r always together for most of the time we r 19 years old then i had a few small boys their age r like 11-12 living in my building then he came to know them and he began ask about them every time then me and these kids had a small fight and they stopped talking with me and they told to my friend that if he wants to play or talk to them he should stop roaming with me .. and then my friend came tome and told me that he left those kids he dont want to see tneir faces and he will not come to my building because he dont want to see their faces and then from 2 days he is not answering my phone and then i came to know from 1 of those kids that he meets them secretly now u tell guys what should i do