The foremost thing you should focus on is your spiritual advancement and connection with the Gods, as that helps us deal with any problem, whether this one or something else.
Yes, this situation can seem difficult, as the nature of the enemy is to integrate with us for their own survival. HPHC had talked about the enemy doing rituals to push their women onto Gentile men, and so on. Therefore, feeling good feelings towards them is normal as this is what they try to do so we like them, especially if supported by good synastry, and so on. It would be silly to imagine that every enemy immediately bites us as we walk by them, metaphorically.
Regarding your friend or other "normal" people of the enemy, the problem is that they can be used as an attack vector against us, like when aggravated by enemy curses. Even though she is not trained in magick, her soul still connects to the enemy's magic and energy on a racial level, therefore she will act in ways aligned with them, even subconsciously. Even if she does not actively sabotage you, maintaining a deep connection with her supports an energy transfer between your soul and hers which will weaken your own. During times of warfare this can damaging if the enemy uses it to make you think negatively about the Gods or this Path, or other corruptions.
I would liken this to if someone has a secret bad habit, like a drinking problem. It is still possible to meditate and make some gains, but the problem also undermines them at the same time and can potentially collapse them.
I don't think anyone is saying you should call her up right now and tell her to fuck off, but I think you should start to distance yourself, taking time to find new friends, as there are certainly many others. This is not even just for the enemy, but also other negative people in our life who hold us back, which we may feel attached to. It might sound strange, but you can find people who have the same energy that you would want to be best friends with, shown by your 7th house on the natal chart.
Furthermore, this is something to talk to Satan about, as the Gods care for our mental and social health and they have likely seen this situation many times before. They can help alleviate any fears or emotional attachments so that you are able to move on, just as we have to do with many other concepts in life, whether bad friends or negative behaviors. Through this and other elements of advancing your soul, you will be able to move on without the hesitancy you may be currently feeling.