Sina, Scout.com's No. 82 prospect in the 2012 recruiting class, gave a verbal pledge to Bill Carmody and Northwestern.
"I just really felt comfortable with the coaches and I really saw myself in that system and the way they play," Sina told Scout.com in an exclusive interview about his college commitment.
Northwestern assistant coach Fred Hill played a major role in Sina's recruitment.
"My first offer was Rutgers as a freshman from Fred Hill," Sina said. "He's now an assistant coach Northwestern. I've known him from the beginning. It's been great with coach Hill. He's been there for a while."
When Hill was hired at Northwestern, he made it clear Sina would be targeted.
"He told me right away, you are our no. 1 guy," Sina said.
"They have been recruiting me extra hard," he added. "Coach Carmody and them have been around this last year. I just know where I want to be and I don't want to wait until after July if I know where I want to go."
Ultimately, Sina liked the way he fit in at Northwestern. Their system and his style of play matched and that was significant in Sina's decision making.
"They shoot a lot of threes and a lot of transition shots," he said. "I think I'd be really successful in that offense. I wanted to go somewhere where I'd be at my best and where I'd be most comfortable."
Sina, a four-star prospect, also considered Alabama. Sina is Northwestern's first verbal pledge for the 2013 recruiting class.