I'm starting to suspect he's not that interested

We talk every day, but I'm always the one who has to initiate it. We have nice long conversations, but real intimacies are never shared. We flirt, but there isn't any real affection. We talk about visiting each other, but no plans are made. I'm starting to feel some dissatisfaction. I don't really want to date other guys, but I don't want to waste my time and feelings on someone who isn't really interested in me.