OKAY I’M SORRY IGNORE ME AND THIS IF YOU DON’T AGREE BUT I THINK 18 IS MORE OF A ZIAM THAN A LARRY SONG FOR THE FOLLOWING REASONS:
the obvious one- harry was 16 when he and louis met
‘a long way from the playground’aka we all know that zayn was head over heels for liam from the very beginning and so was liam- just that he didn’t realize it until a while later, so they were playing around each other which i think is what this lyric is- they’ve made it a long way from the times when they wouldn’t admit they’re feelings for each other.
'long before we both thought the same thing’again, zayn was the first one head over heels for liam- while liam was still blind for some reason and didn’t see that his true love was right in front of him- so from the very beggining, zayn was the first to realize he was in love with liam, while it took a bit of time for liam to catch up
'that these arms were made for holding you’ yeah idk this could apply to both but yeah y'all know how ziam are always holding each other it’s like they can’t survive without wrapping their arms around each other not even giving a fuck that they’re in public- so idk larry might do it too behind closed doors but since i’ve seen ziam do it about 304830 times that’s the first thing i thought of when i heard the lyrics
and idk this isn’t a valid point but the whole song just sounds more ziam than larry idk don’t hate me