It's too late to realize that going to this unknown part of the forbidden forest was wrong, he was stuck in some kind of mazes. This brought him some memories of Cedric and Tom getting his body back.
Now the war was over he didn't have to worry about this part anymore.
Suddenly some words appeared in front of him and he started reading:
"This maze will change your life"
"This maze was created to make people realize how their life's mistakes by showing them their pasts"
"The past won't represent the mistake but it will show you the great things you left behind"
Harry started walking and he saw his ex Draco standing there
"Oh Malfoy , you're stuck too ?"
Draco didn't answer, he looked different, his hair was shorter, well he was shorter and he looked like if he was 16..
"Wait this is not Draco, it's a memory"
He watched himself in the past asking Draco out..
"Well, this can't be a mistake, the writing said that the memories aren't our mistakes"
The memory vanished and Harry kept walking..
"This is our first kiss "He said as he watched himself kissing Draco softly , warping his arms around the blond "We look happy .. "
He kept walking "Our first night together .. Draco was so hot .." He smiled as he saw them becoming one body .
Again ..
"We're watching the stars together .. I didn't smile like that in a long time , I can say the same about Draco "
And again
"Here we're playing in the snow , Damn .. we was enjoying everything when we was together , I really loved Draco .. I love Draco"
He finally saw the end of the maze , he was about to get out when he realize it "Draco is the great thing I left behind , I left him for nothing , I thought I was better off without him when he was the only one who can make me smile over everything .. I hope it's not too late, I should get Draco back and I will need a plan for that"