Is it normal to want to make out with by best friend?

So a couple weeks ago my best friend told me that she was bi. I told her that is nothing to be ashamed of and I still love her. She said that was good. Then she said if you are bi too I was thinking we could to it. I said I'm sorry but no. So instead of doing it she instead that we watched porn. So I agreed and we watched it. The week after that we went to the creek in her neighborhood. We had sat down in some dust when we got there. When got up to leave I whipped the dust off of her butt. She stared to laugh and said it felt weird. She got really choose to me after that,like she was about to kiss me. She keep asking me if I was bi. I always said no. I asked her were she was going with this she said that I really want to have sex with. I said no. Ever since then I keep thinking about having sex and making out with her. Is that normal?