am i right to be hurt by this? friend betrayal & taking advantage ?

Im a professional gymnast & have been teaching a friend all summer back in June she wanted me to show her some stuff & I wanted to 

because I love to teach. fast forward now she has picked up on some things &decided to drop out of school to pursue it professionally as well. this made me happy that she found something she likes to do but there has been a recent situation &she walked out of my life.I needed her to have my back and instead she blamed the problem on me. I feel taken advantage of because our relationship has been fake & she has just been using me to learn stuff.as soon as I spoke about about how I feel she unfollowed my art pages&all her friends did too. so obviously their support was never real to start with. and not a single one of them have asked for my perspective on what’s going on yet don’t believe me .it’s just confusing because they still support her gymnastics career but not mine anymore even though she wouldn’t even know anything about gymnastics if it weren’t for me. it’s just a little weird to me that all of a sudden she has the same exact goals and dreams as me .am I right to feel this way? also there has been multiple times where I have the opportunity to talk about what I do & she overtakes the conversation&talks about herself instead even though I have been doing this for years. it feels like she was friends with me while I was teaching her stuff & as soon as she learned enough to do it on her own she left me and is trying to act like it’s hers.