If you are unsure, at least wait until you are sure of that person's character.
A good question to ask yourself when contemplating a possible date is to ask yourself if the person lives gospel standards.
It is better to not date then to date someone who does not respect you.
The chances for a happy, healthy temple marriage are much greater if you only date other Latter-day Saints who uphold the same standards.
Youth should avoid dating the same person too regularly.
When dating, do not do anything that will endanger your worthiness to serve a mission and enter the Lord's holy temple.
Learning how to control yourself while dating will greatly help prepare you for a strong, spiritual future. Extravagant, expensive dates will unnecessarily limit your dating experiences.