Insecurity or guts?

Something smells fishy and I don't know how to explain it. Sometimes I think I know the truth but... As much as I wanna brush it off, it keeps on coming back to me. Like what people always say.. U can feel something is not right when ur other half is doing something wrong... It's like sixth sense. U can just feel it. All the time I've been trying to prove myself wrong, sadly I'm always right. Sigh. 

I know what's going on although he keeps on denying it... I wanna say.. I wanna scream.. Saying that he lied.. But I guess I don't have the right to do so. It's his life. his love life. Why is it so hard for me to let go? Why is it so hard for me to face the truth that I'm no longer a priority for him? That.. I'm just a friend..? Why can't I just hate him like most of the breakups? Why I don't feel relieve at all when we broke up? 

He changed. Somehow it feels so distant. My heart and his. I know mine cause it's the heartbreak that makes me like this. I feel sad and angry at the same time. I just don't know..