Hi forum! It's been a really long time....
Anyway, my girlfriend started smoking again today after having quit for 1 year. I'm really worried about her so I asked my dad for advice and she's really pissed off about that because it violated her trust. Now she won't talk to me at all and I'm afraid that she's going to hate me for it. She's had a bad history with relationships so she's really sensitive about this stuff. I fear that I've gone too far and I won't ever be able to make up for it. I love her and wether she hates me or not, I still care about her. What the hell am I supposed to do?

Well, I'm not ladies man; but tell her exactly what you justsaid. Tell her you love her and you care about her and you just want the best for her. You may be afraid that something might happen to her, but you can't make someone quit smoking. You should find help WITH her. Do whatever she feels comfotable doing, and stay on her side (I'm not saying smoking is okay, just make sure she finds the best help she can get).