I don't like these people

So, here's what happened, I am posting on Instagram these dinners I made with hashtag healthy eating. I'm on the 1st week of my fitness journey. One of my acquaintances who follows me commented "keep going"
She's a nice lady. It feels like she looks at me as a person younger than her. It annoys me when she pinch my cheeks (I hate when somebody touch my face! She did it twice, I couldn't tell her how I felt because we were in a crowd and I don't wanna embarass her and she also looked genuinely expressing how she liked me). I'm 26 and she's 28. She also calls me "cutie"
Anyway, so I just feel like she is not in the position to tell me "keep going" because we really do not know each other well..
So, do you think it's just me or is it okay for her to comment like that? Would love to hear your thoughts