Here’s a rewritten version of your text:
I managed to hide the bruises from everyone… until an MMA fighter came into my life. Now, he’s willing to risk everything to protect me, even if it means taking a life. He insists I stay with him for safety, but Damian harbors his own dark secrets. He warns me that anyone who gets too close to him will be at risk…
To make matters worse, my attacker is determined to finish what he started.