Why did she delete my comment? Am I overreacting?

Okay, like a month ago, I remember commenting on this girl's picture on Instagram (few people liked it and some of her friends commented on it before and after I did). I commented "Cute. " and she responded "Thanks". On the IG app on my iPhone you can see previous notifications and I don't post on IG that much, so I could still see her notification. Then like a several weeks later, I noticed it was gone and thought it was odd (maybe the app or IG is glitching). I then went back to the pic I commented on to see what happened and she deleted all the comments.

I kinda have a crush on her (I'm 17, she's 16). We never really talked in school, except only one time when she lost her Driver's Ed book and I found it on the ground and I returned it to her the next day.
We follow each other on Instagram.

I'm sort of new to IG (49 followers and 93 following). I don't follow people I don't know except for few famous people.

She deleted all the comments not only yours
maybe her boyfriend or family doesn't like people making comments about her (even though she put it on there probably FOR attention)

I think you are overreacting. It might be just that she didn't want any comments or something like that, or she might have deleted them by accident. Who knows. I just think you shouldn't worry because it could have been anything.

You're taking it too personal, Matthew. Like you said, she deleted everyone's commets… Not just yours. If your comment was the only one that was deleted then it would be personal. You're over thinking too much.

She's probably seeing someone and although flattered by your comments don't want to have a situation develop with her boyfriend

So what? Its her pic and she can if she wants… Maybe she is just fed up with all the comments, especially yours