Davion Only and his new adoptive brother, Taylor Going  throughout his life, but now the 17-year-old doesn't just have a permanent home with his new mother and former case worker, Connie Going, he has three siblings to go along with it.  Davion sits on a comfortable leather couch in the living room of his St. Petersburg, Florida, home, and looks over at one of those siblings, 15-year-old Taylor.  "I'm pretty lucky. How often does your best friend become your brother?" he tells PEOPLE. "We have been through a lot together."  It's what they have been through that makes this ordinary day a special one.  Davion made national headlines in 2013 when, at 15-years-old, he made a  for someone to adopt him.  "My name is Davion and I've been in foster care since I was born," he told the congregation. "I know God hasn't given up on me. So I'm not giving up either."  Ten thousand families came forward asking to adopt him, and he flew to Ohio and lived with a minister, but just months later, was back in the Florida system after getting into a physical fight with the man and another child.  He then called Going and asked her how she felt about adopting him.  "I grew up spending time with Connie," he says. "I always cared about her a lot. She was this stable person in my life."  The same went for Going, 52, who officially adopted Davion on April 22.  Going already had two biological daughters of her own – Carley, 17, and Sydney, 21 – when she adopted another son, Taylor, a couple years ago. He had also spent his life in and out of foster care homes.  In December 2012, Taylor saw a picture of Davion on a table in their house.  "He told me that was his best friend," Going says. "I said, 'We all love Davion.' "  From that day on, Davion was able to leave his group home and spend weekends with Going and her children.  "It was crazy that we were able to do things like water activities," Taylor says. "It wasn't always like that. We were so used to seeing barbed wire in the distance, and now we have green grass in our backyard and a swimming pool."  When they were 9-years-old, Taylor and Davion lived in the same group home. The two boys formed a friendship and always had each other's back.  "I liked him a lot. We were partners. You go through stuff together as a team," Davion says. "You don't forget these kids. They're in your memories for the rest of your life."  Davion and Taylor couldn't be happier that they don't have to just live in each other's memories anymore – they get to see each other every day.  "I think it was a blessing Taylor was adopted by Connie and that he was able to recognize the picture of me," Davion says. "I think that was God's work."  From left: Carley Going, Connie Going, Davion Only and Taylor Going  In addition to a new brother, Davion has found a sister in Carley, who couldn't be happier about her growing family.  "My mom always talked about him, and after a while, it just felt right for him to be with us permanently," she says. "Davion is special."  Davion admits he used to sleep on the top bunk and close to the wall at the group home so he could avoid conflict and trouble.  "Those days are in the past," he says. "I have my mom, my siblings, my dogs, my video games. I'm good."
"Everyone always gave up on me, but now I know I'm here to stay," Davion Only tells PEOPLE