jgnat has much better advice than this, but you wanted opinions and I spent 20 minutes writing this so here goes.....
i may be young but shes the one i want and i would do anything for her
If you truly mean that, then the anything may need to include encouraging her to seek out a qualified therapist. Ultimately it may include that you may have to walk away from the situation.
so far shes still with me but i know that i need to show her she can divorce him and be with me
Part of taking care of any woman involves more than one area. Taking care of a 41 year old women who has experienced life will also require more than a 23 year olds taste, because I don't know of one 41 year old woman who wants to start over from scratch.. You would have to upgrade her from her present circumstances, so lets think about the following areas that you will need to handle as a bare minimum.
Security: providing a comfortable home. An average home in the US is about $200,000. To furnish that home figure another $40,000. Then there is auto expenses, power, electric etc.... I think that I'm fair in saying that you are going to need current liquid assets of about $80,000 for a house downpayment and misc. expenses to get started. Then you are going to have to bang home about $60,000 a year for starters.
Emotional: she's been through the ringer and it may take her years to recover from all that she's been through. In fact she may never completely recover and you may have to hear about her husband for the rest of your life. Plus she's closing in on Menapause. (that's when she'll get extremely irritated at the way you breath, talk, laugh, close the door, walk in to the room etc....) If you've been married for 27 years, its not that upsetting, but for the unprepared, you'll be online looking for someone new to chat with faster than you can say "hot sweats".
Physical: You haven't had sex with her yet. Which is good, because "I don't know if I can make you happy" is women code for "My marriage sucks so bad and has so completely sucked the life out of me that sex is the last thing on my mind. In fact I don't care if I never have sex again for the rest of my life. So you could have that to look forward to.
please anybody just help me to talk to her using scriptures or giving me advice on how to do this
Encourage her to go to a therapist. Don't ask her to violate her moral code. Love her enough to walk away if neccessary.