I used to think I was entirely straight, but that thinking stopped about a month ago. Then I discovered I'm Bi, and I was happy with that. Now lately after being broken hearted by a woman, I've only been into guys. I can't feel even remotely attracted to any woman now, but any guy will interest me. Does this mean I'm really gay/Gender fluid? Or is it my heart deciding to heal and not have interest in those that hurt me?
It could be that because you are afraid of getting hurt by a woman again, your subconscious is stopping you from being attracted to women. But you could also be interested in men right now. Even though you have currently lost your attraction to women, could you in any way see yourself being with one in the future?
Then I think you answered your own question It sounds like you are bisexual, and it's very common to go through periods of preferring one gender over the other.