emotionally numb with my boyfriend...

don't get me wrong, I love him to pieces but there comes times where he just pisses me off. For example, he'd download tinder and when I'd catch him, he'd apologize. It deeply hurts and infuriates me to the core. To the point where I'm too annoyed to talk to him. I forgive him like an idiot and he goes about like he did nothing wrong. I want to make it work but it's coming to the point where I don't want him to touch me, to the point where I want to smash his face in with a sledge hammer. He does these little things where it makes me second guess his feelings towards me. My internal instinct is to withdraw, become emotionally numb. Sometimes I feel the love but other times o don't at all. I give him my all but all I get is constant misery. He makes me want to believe he can replace me in a second, he constantly stalks his exes on facebook, I'm not even on his facebook! Not a single picture of us!, he keeps downloading this stupid app and talks to other girls and tells me it means nothing. What the hell!? I'm constantly feeling betrayed. He tells me he loves me but a part of me doesn't believe it.