Weird or nahh?

I am 20 years old and my boyfriend and I have been together for over a year now. Recently I have been feeling attracted to women in more ways than one! Whether it be sexy pictures or even porn... My boyfriend always jokes about a threesome and getting a lesbian vibe from me. I know I'm in love with him and we talk about a future together. Is this just something I need to get out of my system or what? Please comment!!