While dating you should always respect both yourself and your date by refraining from thinking, saying or doing anything that stimulates feelings of desire and arousal.Keeping the law of chastity while dating is one of the most important ways to remain worthy when preparing for a mission and/or a temple marriage.It is also best to wait until you are older to steadily date someone, such as after high school and even after a mission.
The experiences you gain from dating will prepare you for a temple marriage.
It's strongly encouraged to date and marry other LDS members.
Recently I read a study that stated that the divorce rate between two LDS people in the temple is about 8%.
Either it sucks now because you don't date her, it sucks latter because you date her and break up, or it sucks because you get into a marriage where her faith asks a lot of her and her children and that causes problems.
I know that's pretty pessimistic, but I think if's fairly accurate.