I have searched up the lyrics I think are right . But no joy
It's an oldish song , maybe 80s/90s
Female vocal
Jolly tune
Ok the lyrics I think I know
could be utter shite though
'So I'm standing on the outside looking inside where I want to be
'Loves a lie...loves a lie...loves a lie ..cos he's not here'
'He's got a crush on my best friend but she don't care cos she's with someone else ....
Searches of lyrics are giving me Neil Sedaka and Taylor Swift 
Anyone decipher my rambly mindthoughts ?
TIA