you have applied for entry clearance to visit the UK for 2 months for a holiday to visit your fiancee

Whilst you have shown that you have funds in your bank account i am not satisfied that they are genuinely available for your bank exclusive use. i am not therefore satisfied that you have sufficient funds to cover the cost of your visit.
I am not satisfied that you intend to leave the UK at the end of your visit and that you are genuinely seeking entry as a visitor. your application is therefore refused under paragraph 4.2.