When a guy gives you mixed signals, what should you do?

met a guy in my college club who I thought had a mutual attraction from the start, but he ended up asking my friend out who lead him on. Later in the year we started chatting on line and somehow it got ual...he talked too about how he wanted a g/f, but I was afraid he just wanted me as a g/f for , so told him I wasn't looking to date at the time...also, he never seemed interested enough in ME, like not asking those "deep, probing questions" people say guys ask if they like you, so I ume he doesn't. He ended up getting a g/f, but they broke up b/c she didn't spend enough time with him. Now he looks at me a lot and smiles, compliments me, and tries to make me laugh and looks at me when talking to a group. He was teaching me a game and kept hugging me and complimenting me for getting it. But when I try to hug him he doesn't want it...Seems like he talks the ears off of everyone else but me. Also, when talking one night he said he didn't think one had to be ready to be in a r/s, it just happens and today he said he would like a date (in reference to someone's joke) and he looked at me. He has said twice now that I confuse him. Last night at a tail party I was in a little black dress (i'm usually innocent looking, but when I dress up I like to dress up). He told me I looked very seductive. How should I take that? Should I do something? Today I had a play, yet he didn't come even though everyone else in the house did, guess he didn't care!