"But... other people love and don't... Aster gets angry. If I get hurt she will fight. But she doesn't lose control. She doesn't..."

Love and hate were closely linked. Rage and love intertwined. He concentrated on breathing, not moving away from Ignis. Letting his touch comfort him.

Remember why it does. Remember why he was angry, perhaps that was the key. To make the love matter more than the rage...