Can you really just dump someone and not care?

I was with my ex for 3 years. He dumped me stating that I argued too much. Throughout the relationship he body shamed me, warned me that people from his church may something about my weight but still wanted me to attend, and also admired Victoria Secret and Instagram models but acted like I was just a body to him. When I really started to speak up about it all he got frustrated and left me. When I gave him his stuff back he said that he would always love me but how?
Can you really just dump someone and not care?
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