Teen heartbreak ?

So I met this guy earlier this year during the Summer. We didn’t talk until a few weeks ago since we don’t live in the same town, but we started talking again like 2 weeks ago. He told me he loved me and that ever since I came into his life, his world had gotten better and that made me fall in love with him. But now he won’t even talk to me. Two days ago he posted a picture with some girl that he’s never even mentioned before and I’m heartbroken, because I had never even met someone who was so kind, funny, compassionate, and it didn’t hurt that he is extremely cute. I just don’t know what to do and I’m so hurt right now.