I think it's completely normal, and you're not overreacting. Your emotions are evidence that it happened. It sounds like he was gaslighting you - that is, making you believe you're wrong about it all, that your feelings are wrong, that you're making it all up. You can google it and see if it makes sense to you. When each particular episode seems innocent enough, and the person is nice to you otherwise, it's very hard to pick up on such things. So you think that you're oversensitive or overreacting. But I am 100% sure you can trust your feelings. They don't lie to you.