First of all, sorry about all the posts lately! I have numerous projects on the go and you guys are really good at giving feedback and offering help.
So, here goes...
I've had the idea to write a story about a writer who doesn't enjoys his own life nor himself as a person, so creates a character who has everything he wishes he had. Money, looks, success etc. He begins to get obsessed and live vicariously through this character.
The problem I have with this is that it's a premise, not a story. If anyone could help me with this in terms of where the story could end up that would be fantastic.
Thanks a lot in advance
The logical endgame of a story like this is typically that the writer starts, as you say, vicariously living though this character and, as such, starts to take on the stereotypical psychological traits of his fantasy self. It starts off as him being more confident in his life, where he starts to stand up for himself, goes after The Dream Girl (probably while The Soulmate is right there without him even realizing it), and even writing better, but that confidence starts morphing into cockiness and eventually narcissism, with him starting to alienate his friends and/or family. It comes to a head where he has a real Come To Jesus moment where he starts to lose everything. His friends abandon him, his publisher cancels their contract, and/or he severely hurts The Soulmate on a deeply personal level. He eventually realizes that despite his own rich fantasy life where he has it all, he still isn't happy. Eventually he learns that life is not about having external riches, but internal ones, and he starts on the slow road to redemption.