I've taken an OD, so I can talk about what helped me.

I was forced to see a T while in hospital - maybe this is the case for her too.

Thereafter it was my decision to continue seeing my T. The emotional support helped, but at times I just wanted to be alone. Sure, it's important to know there's someone there when I need them, but I also needed my space. Be sure to really be available for her once she reaches out.

Please don't feel guilt yourself - this was really not your fault. You cannot do more than be there for her when she makes the decison to ask for help. Ideally she needs to see a professional, but if you keep bringing it up, she may well reject it even more