First time and got chlamydia

Where I live everyone sleeps with everyone ( deadass ) and there’s a couple of people that I’ve heard is “burning” but I don’t pay much attention bc in my head if they was I think they gotta be going to get medication for it. Apparently not.

My friend lost it to her long time ex and got checked after and found out she had chlamydia. For everyone out there if you know your partner is more sexually active than u or just to be safe y’all both should get checked, and always use condoms.

She didn’t tell him that she had it and that he should medication for it because she was upset and he should know already.

Was she in the wrong for not telling the guy who have her chlamydia that she had it? ( my friend isn’t even 15 yet )