Boy problems...Help me pls!

During the summer I met this guy he was older , Not by too much and we kicked it off really well and I started to like him. So two weeks into our friendship we started dating and then we dated for two months and he came to see me. At that time I was a virgin and when he came and seen me we had sex. The sex was good and I really was just feeling this guy because he helped me through like every personal issue I was going through and we had some much in common, we understood each other. But after that two weeks later he went MIA and he didn’t text me for a week and all of a sudden he blocks me. When I saw that it crushed my world because not only was he my boyfriend but he was also my best friend, I told him everything and he told me stuff about him and he made me feel Like the most prettiest girl in the world he put me in cloud nine,you know so I just understand what went wrong. It really hurt me because I saw myself with that person in the future.

I know this may sound naïve but I’m 17 and that guy really meant a lot to me and I don’t know what to do I’m beating myself up because I feel dirty like how could I be so stupid.I’m having a fight with myself internally I don’t know if I make up a new way to contact him just so I can talk to him or do I just leave it alone and move on and hope maybe someday he’ll come back.