In my opinion, no she doesn't. He was his own person, and she hers. She wasn't his "keeper" and obligated to say nice things to him.
A story (related, in my opinion):
In college I had a roommate who played football and made decent grades his first year. His second year he started staying out all night drinking and partying. It started impacting his football and his grades. When I was in the room he'd wake up and ask me if he should go to class or practice. At first I reinforced that he should get up and go to class, or go to practice. After a while though, I recognized that a) he really didn't want me to tell him to get up, and b) it's not my job to motivate him to get out of bed, make better life choices, etc. So I changed and started telling him what he wanted to hear. Should he go to class? "Nah man, you should go ahead back to sleep". Should he go to practice? "No, you don't need practice today!" At the end of the second year his grades had dropped enough that he wasn't able to play football any longer. He quit school and moved back home.
Am I responsible for him failing his classes, becoming ineligible to play ball, and quitting school? Not even a little bit. I took care of my life, it was his responsibility to take care of his. I didn't force him to make the choices she did, and this weird chick didn't force that kid to kill himself.
Anyway, that's my "NDallasRuss is an ahole" position on this.