My friend disappears from my friends list without even removing. BOTH SIDES

For some reason after waking up today. My friend who I happen to have known for over 3yrs happens to have disappeared from my friends list. And also he tried to send a gift to me since I did something for him YESTERDAY in LAST GAME. THERE IS A PROBLEM THAT NOW I CAN'T RECIEVE GIFTS FROM HIM RIOT YOU MESSED UP AGAIN!!!!!!!