The 27-year-old quit Inter after the club decided to cancel his contract last month.
The Brazil international admits he was unhappy with life in Italy.
“I didn’t leave because I wasn’t feeling good at the club,” said Adriano.
“I wasn’t feeling good in the country. Inter is an exceptional club.”
“I didn’t do this to try to take advantage. I did it from my heart.
“I took a break to rest a little and get things going in my life again.
“I am back at home where I grew up and there is nothing better than being here amongst friends and family.
“I always wanted to return to Flamengo. I never thought about quitting football. I just needed some time to relax.”
