The Expession

 If someone continues to do something that hurts you, do you ask them to stop? or do you tell them how you feel?

In this case, I would go for expressing my emotion, instead of requesting their support; because by asking them to stop, you are giving them control, by letting them know that they have a choice, of either accepting or rejecting your request; and by waiting for their response, you are no longer, in control.

However, by telling them how you feel, you are expressing your truth, and taking away their choice, because you're not requesting a favor, you're now delivering a message, which means, you are no longer waiting for a response, and that's how you let them know, the impact of what they've done, without giving away your own power.