last kiss: does she love you truly or is it just inflatuation? I might be wrong but this is something you must find out first. You said she was born here but be careful in taking any indecisive decision since getting married with a right girl and a girl who value who you are matters the most. Looking from the point of you, she wants to learn more about you or may be looks like she is not acting fast about marriage loks like that why she wants you to date more but she wants to observe you for a year that can be a red flag.
Take right decision before getting married, if both of you think alike or respect each other get married but before doing that do some homework and know what you want.

Best wishes