I don't understand exactly what "deal with your trauma" means
Processing trauma, in its absolute simplistic infancy, is about changing a negative emotional connotation into a neutral / positive one. Remove the negative to either one, neutral or positive emotion. When confused, swap out trauma for emotion instead. Processing emotion.
See
here for more thoughts on the subject.
Guilt and shame also have a huge influence on how we deal with trauma, particularly where sexual abuse is the trauma. You can read more about that [DLMURL="https://www.myptsd.com/c/articles/guilt-and-shame.8/"]here[/DLMURL].
Without a doubt, she needs professional help. A specialist trauma therapist, if you can find one. If she is uncomfortable talking about things face to face, perhaps you could encourage her to join this site, or our sister site MySexualAbuse ? I think she needs to realise that there are many other people out here who understand what she's going through, which is why support from people who've been through similar can be hugely beneficial. Yes, her story is unique to her, but the feelings of guilt, shame, despair and suicidal thoughts are very common, along with nightmares and depression etc etc. Just finding out that you are not alone in how you feel can be a big help.
There is only so much you can do for her. You sound like a lovely guy. The best thing you can do is to learn all you can, keep lines of communication open, and listen if she wants to talk. Give her space if she needs space, pass on anything that might be helpful without pushing her into anything. Yes, she needs professional help, but she also has to want to do it for herself.
Therapy is incredibly difficult - that's why it's so scary. It brings every negative emotion to the surface, and makes everything 100x worse, before things even begin to get better. That's the tough thing. But, with the right help, things do get better. Once she can accept that process and ride the bad times without doing anything stupid - then she has every chance in moving forward.
It's very difficult to give individual advice, when the information you need to start with is probably already here. There are loads of resources here. Check out the following page, which has loads of links to some of the best information on this site. http://www.uic.edu/cuppa/gci/publications/workingpaperseries/pdfs/anderson 05-04.pdf