How To Tell If a Man Is Interested In Dating You...Or Not!

"How can I tell if a guy is interested in me? We went out on a date and I had a great time with him and would like to see him again, but I am confused. I wonder if I failed to send out the right signals to encourage him positively OR if he was just ignoring my signals because he was not interested. I thought we had a lot in common and got along well. So how can I tell if the interest is mutualt? What signs should I look for to know a man is interested in me or not?"...