Is it normal that i hate boys?

I'm a female and I kind of hate boys. It all started when I liked a boy and at first we were like flirting each other, and I ended up not talking to him eventually. It's not that I didn't like him but his behavior changed after a few months. And he now is not the same with the old him when we first talked. He often talked about the girl he just met with me, using curse words when he talked with me, etc. He even flirted with my classmate which i find so disgusting! That's why I dumped him right after he let his colors show. And now, I feel like I hate all of the boys that I spot with. But I'm straight, though. I just wanna focus on my studies. I feel so stupid for wasting my time on him like i used to before, he's the only one i was thinking about all day and couldn't pay attention at all when in the class. My grades also fell down, I flunked many tests. I'm so regret now! Never thought he would turn out into such a hoe, shady and evil o_O ~ feeling numb!!!