Twilight loves living in Ponyville, though the change is a little bigger than she'd first expected. But things like homesickness and dealing with the way everyone seems to stare and whisper are all just part of moving somewhere new.
Life is like a train ride, don't you think, dearest? Destinations will change, trains will be caught and missed, but there will always be somepony willing to journey with you—so long as you let them.
For Twilight, the increased lifespan that came with princesshood had forced her to outlive her friends, but thanks to Rarity, she will learn that centuries could be lived in but a single day.