HELP!😔

Kay
I once considered this girl my bff but since we went off to college she's much more..."free"! Not judging freedom is good but she apparently sees nothing wrong now with having sex w/ multiple guys no condoms no bc. The other day she txted me saying "it's my first time buying plan b😅"...it ticked me off because that's nowhere near funny & the effects of plan B can be harsh on the body. She acts like its nothing & that bothers me but I don't wanna leave her in the dark I would like to help her. I don't want to say the wrong thing though. all advice is welcomed