Sexuality?

Hello there everyone, i am a teenager and I am very much positive I like both guys and girls. I currently have a boyfriend and he is aware of this. But recently he kissed me for the first time and I felt nothing. Not even butterflies, nothing. This concerned me, I’m not sure if I should question my sexuality which I was considering bisexual or him. I love the boy but I am just very confused and conflicted. I would love to hear everyone’s thoughts on this to give me some kind of insight as to what I should think.