If you love your boyfriend and are happy with him, then let things be the way they are. If you find yourself falling out of love with him or for some reason the relationship falls apart, let yourself just go with the flow.

I would have always sworn I was straight. Then I met a woman (she was a colleague and I was in a relationship with my boyfriend!!) and there was just some click.

Yes,I had to fight past the stigma too. And it ended up not working out between us, and i went back to my boyfriend..
but the point I'm trying to make is to show you how I personally have experienced a fluid sexuality. I'm not going to put a label on myself and i'll go with whatever makes me happy!