Complicating the speaker's desire for salvation is the fact that he loves God in more than just the regular spiritual way. He seems interested in marital and sexual forms of love, as well. The bottom line is that he's unsatisfied with the kind of love where one's relationship with God is one-sided worship. He wants to feel loved back, and he's not sure how God can manifest that love.
The speaker's love for God is an easier, more natural expression for him than his plea for abuse. His language flows much more calmly and easily in the lines of the sonnet where he expresses his love directly.