You're friends salvation, spiritual enlightenment have nothing to do with your attacks personal. What it may be is the fear of you reaching that level of spirituality, I hate saying that word level...so let me rephrase the fear of you having a deeper relationship with God.
There's no levels, this is not freemasonry or AA. How we treat others, our devotion to God, our ability to resist temptation is how spiritual maturity is measured.
But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith,. galations 5:22
When we master those fruits, that's our evidence of maturity. I can say John Doe is walking in the spirit and not being lead by the flesh.
Spiritual gifts are not granted to put us on levels. It's all jib jab to separate those who are enlightened. In the family of God we are one body, no one is above the other therefore levels do not exsit. It's a pagan phrase " Spiritual Level " ..I call it the Pride level scale.
If the Devil is attacking you , it has nothing to do with your friend. If the Devil wants his soul, he'll attack him...Him attacking you does not mean your weak, he just wants your soul.
The thief cometh not, but for to steal, and to kill, and to destroy: I am come that they might have life, and that they might have [it] more abundantly. John 10:10
This is why he's attacking you, it's his nature...but thank God for the solid rock on which we stand, Jesus christ who came to set the captives free.