Scared of getting cheated on?

An anonymous post was posted on Instagram that asked people about slutty confessions and there are very disgusting ones that literally made me feel sick including ones where a girl cheated on her gf with her best friend, and another where she went out slept with 3 people and came back cuddled with her like nothing happened.

I feel rage like I wanna punch that disgusting fucking bitch in the face. What if in the future happens to me? I’m afraid of how I’ll react because I’m not myself when I’m angry, and completely puts me off relationships. Help please.