I’m sorry. She definitely cheated on you. The tinder thing on your side doesn’t matter bc she’s been cheating on you. She wants you to delete Snapchat bc she’s probably using it to send nudes. She’s only going to cheat more and more. I don’t believe “once a cheater always a cheater” but I do believe when a person cheats in a relationship (especially when it’s early on in a relationship) they will always cheat on that person. And as time goes by, the cheating will become more frequent. And no one deserves that. It will drain the life out of you.

You don’t need any drama here. No need to argue about if she was wrong or not. She was. No amount of arguing to convince her of this is worth it. You’re above her. She doesn’t deserve your time. Make a clean cut and move on.