I’m not sure If letting my girlfriend try bbc was the best thing or worst…

We’re in college and have been dating for a while. She’s been really wanting to try sleeping with someone because she hasn’t been able to in a while. After some convincing and a lot of conversation I gave in but didn’t know what was to come. I thought it would be a one time thing and we’d be fine again. She told me who it was going to be and I was shocked…. 6”3 black and packing. I was super nervous about it after that but didn’t want to say anything. She was gone all night and I heard about it for days after that until she asked again what I thought and pleaded with me over and over. This was about a month ago and since then it’s become just a normal thing for us that’s way out of my control. I think she might be addicted to it. I know she loves me and only wants to be with me but sexually right now her mind is only on bbc. I’ve seen it on her phone her texting them all the time. I’m not sure how it happened or what happened that first time she tried it but she’s hooked