I've been through this with every person I've ever dated. I feel like I'm 27 going on 57.
I've just come to realize that I am, at heart, a very restless soul. I know I love the people around me, I know I have loved and been loved in return but I have this tendency to question whether or not I've actually been IN love. With nothing to compare it to, I've simply dated to date and thus been in monogamous relationships my entire life.
The funny bit is that I don't even believe in monogamy. Humans are horrible to each other; we cheat, lie, steal, use and abuse each other to the point of questioning a different person because of what a previous person did. I enter into every relationship hesitatingly, cynically and with a jaded heart. Sometimes I wonder if I am, as an ex delicately put it, an emotional robot. I don't feel anything.
If you don't love the person you're dating, tell them. At least, in the end, you know you've been honest. Its not about letting THEM go if you love them, its about them letting YOU go because they love you. But I've always taken the safest route and uttered the two most harmless words,"I'm bored." There are so many people out there, its impossible not to wonder if you wouldn't have more fun with someone else. In the end I feel that its not about letting THEM go if you love them, its about them letting YOU go because they love you.