why is it that she didnt asked you to go out and party with her? she was too young when she started dating you, and she never had the time to have experiences, but, also, she could of told you to have those experiences with her?... Give her some time, and in the mean time you can also have some fun, if she loves you, she will get jealous and she will let you know that she is, and then you'll realize if she loves you or not.
GL!
GL!