Mixed signals from a Scorpio/Cancer moon?

He's a Scorpio sun/Cancer moon/Libra venus/Virgo mars/Cancer rising. He approached me a few times in the past, but I blew him off over and over until finally he gave up. But now almost 3 months later, I'm interested. But of course, I didn't know if he was still single, so I dropped a few hints to his best friend. He called me that same day (Sun). I never gave him my number. But I was very direct; got straight to the point about how I was messing with someone else back then, but I'm looking for something new and I'm interested. He flirted back, but in a more serious way. I could tell he was suspicious though because he wouldn't stop questioning why I ignored him for so long and then popped up. But the conversation still flowed well, I ended it and he said a sweet goodnight. The next day we got together in person and he was really serious looking, never cracked a smile. He kept texting me to meet back up, but whenever I would, I ended up doing all the talking and the little talking he did do was in whispers. He was very polite though. Helped me hold stuff, offered to buy something, held the door… And he introduced me to his brother. We talked until 3am that night. Then he asked to meet up again yesterday and he was smiling and a bit more talkative. But at the same time, he still acts uninterested! He completely avoids eye contact when we're talking. The couple times I brought up the thought of forming a relationship, he quickly changed the subject, but did ask what I looked for in a potential boyfriend. I asked if I talked too much and he said no, I sound sophisticated and he likes smart women so it's a turn on, but besides that…. He's never really complimented me and didn't come out and say he liked me until I talked to our mutual friend about it and then that night he said it. He also added on that he wouldn't waste his time if he wasn't interested and that he cannot read my mind to know how I feel and what I need, but I still get the feeling that I'm chasing him and he hasn't even asked me on an actual date yet. Why?