What the point of dating in high school
Get out there and meet people and be able to have something to bring to the conversation. More importantly, if you are a needy person and you want to date a loner, you will have problems getting to a comfortable intimacy level. If a girl is known around campus as a cheater or if a guy's reputation is less than angelic, don't think that you will be the one to break the mold.
Try to find someone that you think you can relate to - socially and mentally. Nothing is worse than being the one who 'shoulda-seen-it-coming' when a person's old habits repeat themselves. Separate your relationship from your school responsibilities.
If you don't know what the boundaries are in your relationship, establish them before you end up in an uncomfortable situation. Remember that after high school, life changes dramatically.
Once you know your boundaries, demand that they be respected. Sometimes the strongest boundaries are mental, or emotional. That's not to say that you can't form a lasting relationship at a young age, it just means that you need to be ready for long distance and a whole new set of problems as an adult.
Also, if something goes wrong, you'll need your core group of friends to hold you up and be there for you. Having middle men and friends that like to interfere ('help') only makes problems worse. Whether you're 15 or 55, keeping open communication with the person you're dating is absolutely essential.