How many people did you date before you found someone that stuck?

I'm finding dating frustrating and exhausting. After a long relationship I've been dating for around 7 months on and off, some of them I've met organically, some online. Nothing has lasted more than a month some of them were nothing more than a hookup but I really just want to find something that will last. I'm sick of head games. I'm probably getting close to 15 whereas in the time before I met my ex I maybe went out with like 3 girls.