How do you tell your parents you have a boyfriend?

I don’t have one yet, but there is a huge chance at school that I could. One thing is, if he is my boyfriend, how do I tell my mom? I’m hanging on a thread with her about trust because of a huge past situation. I know some of you might say “Why tell her?” But I really don’t want to lose trust with my mom.

I honestly don’t care if I have one, but what is the best way to tell her?