Poem 109

In Poem 109, Catullus's tone takes a drastic change. Instead of referring to Lesbia with great longing and desire, he refers to her as if she is his partner in a friendship. In the last couplet, Catullus speaks of this eternal contract of sacred friendship. Of course, without friendship, a meaningful, passionate love is not possible. But, why, all of a sudden is Catullus leaning toward a more platonic relationship, though he refers to her as "his life" in the first line.
Another important revelation occurs, in the first couplet where Catullus identifies that Lesbia acknowledges his existence, and more so, mutually cares about him. Lesbia promises that the love between her and Catullus will last forever, when previously, she went from not even acknowledging him, to 'talkin smack' about him. What about her husband, who we know is so oblivious, like a mule? Does Lesbia feel no guilt at all toward him? Though she has not literally "cheated" on her husband yet, per say, the supposed feelings she has toward Catullus should create some guilt on her behalf.