Is my best friend not even a friend anymore?

Okay so.... my best friend and I have know each other literally our whole lives. Freshmen year we were so close like always. This year, was horrible. She startes hanging out with a lot of people and I was just there. She also met a guy. It's now summertime and she only hangs out with me and its just us and I feel like its only because she's trying to make it up to me for not hanging out ay school anymore. But it is summer I have not done much yet she always has to upload pictures of her and other friends hanging out. Is this even a best friend???