Confused??

I’ve always struggled with my sexuality. Ive had 2 relationships, 1 with a guy, and 1 with a girl that both ended in disasters. I think I keep telling myself I’m straight because I know it’s the easier thing to do, but this has led me to not knowing what I’m even attracted to. I’m just curious as to when people knew for sure who they were attracted to? I don’t even know if I’ve actually been attracted to people, or have just been attracted to the idea of being with someone. I’m not looking to put a label on myself (not that that’s a bad thing) I’m just confused overall. Any advice?