The 15-year-old is set to sign a five-year deal with the Tigers once the move from his home-town club is rubber-stamped on Friday.
Barlow told the Grimsby Telegraph: "Like I've said before, my dream was to play in Grimsby's first team and I was lucky to do that briefly in pre-season at Winterton.
"But when a Premier League club comes in it's hard to say no. I just have to go there and play like I did at Grimsby and, hopefully, it will go well for me.
"Phil Brown has said he isn't afraid to throw young players in so it's an incentive for me to go there and hopefully be good enough.
"It's not the easiest thing to leave the club I support but it's the best for my career."