Why does this guy like me&& what should I do? ?

I met him through a friend, she got a new boyfriend so she thought she would try to introduce me to one of his friends. I got my heart broken and, gave up on relationships, but she insisted that I meet this guy. So I finally did. He brought a friend! Btw this guy and I had no connection nothing what so ever which is what I was hoping for! His friend he brought was quite fond of me! Chased me around for over a month finally gave in and went on a date! We had an awesome time! He is so out of my league though, he is so handsome, funny, full of life, and TALL like 6'7( which I love since I'm 5'1) We are so different! I dont understand why he likes me! The only common intrest is imports, but surely he isn't dating me because I'm a chic that likes cars right? I know its not sex, because we had sex before we officially started dating and after dating we didn't for like 3 weeks, but we both are busy people! Idk what to do!!!! All I know is that I'm falling for him and I'm scared sh**less!