I need a label so I can be sure of myself

Over quarantine I’ve questioned my sexuality. I discovered that I’m actually also attracted to girls, especially after starting to be attracted to one of my friends. But, and this has happened with every single one of my crushes, I’ve just stopped liking her. I’ll like someone for like 2 weeks, I’ll talk to them and just have fun, and then something’ll happen, like I’ll ask them out, and then the next day, sometimes even right after, I’ve just stopped liking them. I’m keeping my bisexual label for now, but I want an explanation. My confidence grew over quarantine, and I’m scared I’ll just stop being so confident. You can @ me if you think I’m being dramatic, but I’m just unsure.