I agree with everything brwneyedgirl said. I would like to recommend the book, Attached: the Science of Adult Attachment

Some people are just wired to need connection and closeness; it's nothing to be ashamed of, but it does mean that you have to take extra care where your sex drive might compel you into territory where you feel insecure. It's been a huge problem for me; I feel that if I'm honest about what I want, a man should be honest with me, too... but there really is no shortcut to trust.

One way to deal with it, which I find a little draining at times, is to "keep your options open" and make sure this person isn't your only source of pleasant attention until that trust and easy-flowing communication has developed on both sides. At the very least, it will give you perspective in differentiating between types of attention that you like and types that set off your warning bells.