I regret this so bad

I’ve been talking to this guy, he’s almost 20 and I turn 16 soon. I’m so ashamed of myself for ever sharing pieces of myself with him. He doesn’t treat me well, he disregards my feelings, doesn’t respect me, doesn’t keep his word, ignores me, and he keeps revealing that he’s a weirdo. He’s borderline racist and homophobic. He’s very lustful too. He’s only ever lusted over me and never loved me and he lusted over other girls too while talking to me. I’m just so sad about the way he is towards me and I see him do different compared to how I used to. I’ve never even been mad at him even tho I really should be, I’ve only ever been disappointed at him. He reminds me of my dad. He doesn’t ever take the time to understand me,I’m always forgiving him for his bullshit, and i know he’s not really sorry. He’s never really felt bad or been sorry or else he’d be better to me. It’s a shame because I really should be more upset with him for everything but I’ve only ever been sad at him. He drinks away his feelings so I don’t know why i even expected him to ever understand mine. He’s the most immature and emotionally unintelligent man I’ve met. He’s such a dickhead to me but i miss how he used to be. He used to care about me. I don’t get why he changed, or maybe he just finally revealed his true colors. I’m not happy with him, I hate his guts, I hate his voice and his stupid voice. Everyone tells me I deserve better but I just want him to be better. I hate that he’s always been a weirdo and I was so blind to it. He’s never proven shit to me except that he will constantly let me down. Everyday I hate him more but won’t leave, when I finally decide I’m done he texts me and all my progress resets. I am so sad I ever shared such a vulnerable part of me with that man and I can’t take it back. He’s such took it all for granted. He took advantage of me being there for him 24/7. I’m disappointed in myself.