It can be hard to tell if your crush likes you. Most people are shy. Before you try to find out, however, ask yourself: "Is this a relationship I want to be in?"
It makes sense to want to go somewhere before you get in the car and start driving. Make sure this relationship will make you happy. Don't date someone just because all your friends are dating someone. Don't do it because someone else says you should; if you don't feel attracted to the person now, those feelings probably won't develop later. Don't do it to get revenge; you'll only end up hurting yourself. Be true to your own heart.
Do you see yourself with your crush in the future? Do you want a future with this person? If you don't, should you really be dating him or her?
Today "serious" relationships have a bad reputation as sterile, formal situations that aren't fun at all. But a "serious" relationship with someone you love can be quite a lot of fun. It's serious not as in marriage, but as in serious about each other-- enough to confide in one another your hopes and fears, your dreams and your disappointments.
Of course, thinking long-term, be careful not to get carried away. Don't wrap yourself so tightly you can't unwind when it's all said and done.
That said, if you're serious about dating but don't know if he or she likes you, there is a list of signs that can help you tell.