I like this girl from class and the other day we bumped into each other and i walked her to her class. The conversation went well in my opinion so after i walked her i asked for her snap. She gave me her snap but she didn't add me back. So after 24 hrs i removed her because i thought she wasn't interested but now my friend is telling me that i should've waited because she could've been busy or she just might have forgot.

What should i do?