Questioning my sexuality while in a relationship

Hi! This is a throwaway account cause ppl I know follow my main.
Anyways, I’m a female and currently in an amazing relationship with the love of my life. He’s the best thing to ever happen to me and I love him so much and I don’t want to leave him at all. However, for the past couple years but mainly this year I’ve been questioning if I’m bi. I’ve always wondered but I kind of was on and off about it but now Its something I want to find out. In my mind I’m pretty sure I am bi but I have never had any sort of experience with another woman in that way so I feel like I won’t completely be 100% sure until I’ve at least kissed another woman. The problem is I don’t want to leave my man at all to find out if I’m bi but I also want to know if I am or not. It’s something thats important to me and I have no idea what to do about it at all. Any advice would be appreciated <3