She has an ideal life and family. There's only one problem: she wants to run away from home. (But) after talking with her friend, she postpones the idea and come back to her parents.
A native English speaker told me I don't need the but. But without the but the sentence sounds strange to me. It sounds as if the last part, "...after talking with her friend...", it's unrelated to the previous sentences; it's just an event that follows after.
Maybe I'm wrong?