book romanticizing london, embracing big life changes, letting go of “what if” anxieties

i know this is a champagne problem, but i’m looking for a book to help me through a move from nyc to london. i moved to nyc a year ago and i love everything about my life here. i am 26 and i always imagined living my 20s in nyc; i feel so happy, vibrant, and at home here. i’m not ready to leave at all, i just got here! but i’ve been offered my dream job in london, and i’m taking it with tears in my eyes saying goodbye to nyc. i plan to come back, but i’m worried by the time i return to nyc i’ll be in my thirties and won’t be the same person, i’m worried i won’t love nyc as much, i’m worried i’ll change. maybe i need a therapist more than a book haha, but i’m looking for something that will help me let go of worrying i’m wasting my nyc youth, and help getting more excited about living this era in london and exploring europe. maybe a book about strength in unexpected life changes. and letting go of “what if?” anxieties.