Does "going somewhere" always mean "something goes in a positive way"? also in this context, can I say "going well / improving" instead?
"Going somewhere" here means "progressing". She is saying that she wants to believe that her relationship is going to get more "serious" and eventually lead to marriage. "Going somewhere" does not always refer to something progressing in a positive way, but here it does. "Going well" and "improving" are not precise synonyms for "going somewhere" here. Instead, you can say "progressing".
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