HELP! Looking for a story

I was reading a story where Harry is smarter and more independent. Starts Harry's first year

He meets Tonks and her mum at kings cross, having arrived early instead of the weasleys

Tonks becomes his first student friend

Tonks is a few years younger and is a lonely 7th year when Harry is a 1st year

There is a scene at kings cross where Molly has Ginny repeat the platform number about 5 times in what I see as an attempt to attract Harry too the weasleys. Not knowing that he's already on the train

Ron tries to befriend Harry on but is rebuffed

Neville replaced Ron in the trio

Author's notes indicate Harry / multi.

PC went down due to power cut before I could review and tag story