Some singles have a hard time deciphering whether or not their date is genuinely interested in them. People express themselves differently depending on their personality temperament or even past experiences. In fact, it's not at all uncommon for some singles to mistake attention for affection.
The key to finding out if someone is interested in you as a friend, or possibly more, is through the act of reciprocity. Think about this way. Most people are afraid of rejection, regardless if you're a man or a woman. It really doesn't matter who makes the first move, just as someone as long as someone is making a move to begin with. This gives the other person a chance to respond to the move with further encouragements or a move of his or her own.
For example, simply making eye contact with someone may not be enough to indicate interest, but if you start a conversation with someone, you can gage their level of interest based on the response. If the person continues to engage with, that person is interested in continuing the conversations until that interest escalates or wanes. However, if the person isn't really engaging with you and is responding with simple, one-word answers, then that person just isn't interested enough to reciprocate.
The common expression "it takes two to tango" has never been more true than in dating and relationships. It's a wonderful dance of give and take to a song that never stops. The next time you meet someone with romantic potential, put out a few feelers in the form of playful comments or potential opportunities to hang out in the future and see if the response you get is favorable or revealing in other ways.