I can only speak from a male perspective, being a heterosexual male myself. Most men have this 'ego' thing going on. You know, when you tell them, when you pour your heart out, and they suddenly manage to turn everything around so that it's all about them and no longer about you? That's it, that's what I'm talking about. Somehow, they _have_ to put themselves somewhere into the equation. For some reason, they start questioning themselves, and their fragile little egos cannot handle that. Most people (both men and women) are unable, unwilling to think about themselves.
If you tell someone, and they react poorly, it's not about you. It's about them, and their unability, unwillingness to confront themselves. Somehow, they feel confronted by themselves. They run away, not from you, my dear Shelina, but from themselves...
This is why it is a good idea to be very careful who you divulge this information to. Usually, if you learn to know a person, you can somewhat predict their reaction beforehand.
There are men out there who appreciate you for who you are. Who don't care what you are born as, but who appreciate you for the woman you are. And no, they are not gay or bi or even bi-curious... You're a woman, period. You're a lady, and you deserve to be treated as such.
Alas, they are few and far in between... What does it matter what you are born as? It doesn't matter a single thing. It's only a shell, what matters is what lies inside, the person behind the facade (if I may call it that). What matters, is what you have within yourself to become... Everything else doesn't matter.
When my girlfriend (m2f post-op) told me, my entire world view, so carefully construed according to my own illusions, was greatly shaken and decisively altered. I had never been confronted with gender disphoria before. It had no place in my world, simply because I was ignorant, I did not even know it existed... And yet, right in front of me, there was this girl who I got along with so great, and she told me 'she didn't always look like this'.
I've said this a number of times already here, but it only took me two seconds to realise it didn't matter one bit... I was startled, yes, but who wouldn't be? After she told me, she looked deep into my eyes, and I realised it didn't change what a wonderful person she is. She has the most beautiful eyes I've ever seen. She truly is a queen among women.
We're not all like those 'men' you've encountered. Some of us genuinly care, appreciate you for who you are. But it is true, we're few and far in between. Please do not let that dissuade you from being the wonderful person you are...