Just... Confusion...

I recently broke it off with my boyfriend of 9 months. He was a flirt, always hanging on other girls, but at the same time, he was super clingy, always right 由 my side, always had to be touching me in some way. He was way too overprotective, always getting into, sometimes physical, fights with my best guy 老友记 until none of them spoke to me. And the big reason... I was interested in someone else. This other guy had always liked me since I met him, and he wasn't afraid to 显示 it. He would always sit 下一个 to me, invite me places, flirt with me, but I never could do 或者 say anything back because of my now ex boyfriend, so this other guy thinks that I hate his guts, when I was just trying to keep distance, not wanting to cause trouble between the two boys. Did I mention they've hated each other since grade school? I just don't know how to 显示 him that I don't hate him, in fact I like him a lot..