Thanks all. There's been no back lash or anything. I don't really feel bad for what I did. Especially when I know him well enough to know that every text to me mentions her because he's doing her best to rub it in my face. I'm ignoring it.
I can already see things not being great for her, but apparently she knows he wasn't nice (he's told her, so he says).
I'm not involved, or getting involved in anyway & I do feel better knowing that her family are prepared for what could happen.
If I wasn't so close to her cousins, or she was older I wouldn't have said anything at all. But I know 19 year olds can be very naive.
He's already proving me right. But I'm not worried at all about how I may have sounded.
I feel comfortable with the decision I made.