Sexuality bisexual?

I have a large crush on one of my best friends. We kinda act like a couple foo all though she is bi and I have claimed for years to be straight. I love her to death and I don’t know if I’m bisexual or if it’s just our strong friendship. I honestly love her sm. We cuddle all the time and always hangout. We also kissed on New Year’s <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> as a “joke” but my emotions are really confused. She said she would never like me I that way and idk what to do. I haven’t said anything to my family but my step mom said to my brother “well your sister is bi” I looked at her confused. My family some how is open for a child being gay but If I’m bisexual it’s just because I’m desperate for love and wanna get attention. I know it’s not like that in my heart now but I just don’t know who to talk about this with.