This answer contains spoilers… (view spoiler)[He didn't have a chance to save Hannah's life. It was too late when he realized she was broken, but with Skye he saw an opportunity. He understood her change in a different way. He saw Hannah in Skye and realized he could be the change in her life. It didn't have to be the same for Skye because she didn't have to be completely alone. (hide spoiler)]
Amelia Asher is saying that while Hannah had a radically different life than Skye, they both are psychologically depressed and show signs. Clay just couldn't see those signs in Hannah until it was too late, so he at least is able to save Skye.
sabrina My feeling was because in the story earlier, he saw her on the bus. He remembered how she used to be and reflected on how withdrawn she seemed. Then the story continued. He saw her at the end and reached out because he felt he had a new understanding and didn't want a chance to get away again.
Medea Nightshade If you remember earlier in the book, Skye became a suicide risk a long time ago, and Clay didn't want another person to be alone if something is wrong in their life. He didn't want another person to die. Skye being a suicide risk is a fact but the rest is just my opinion
Nimra Shaikh He knew Skye from eighth grade, I think, and after seeing her on the bus he was reminded that she had changed a lot in recent years like Hannah had. He saw suicidal signs in her but he didn't say anything then. He was unable to save Hannah but he didn't want another person to commit suicide because the world won't change even after seeing that one of them had died. He didn't want to stand back and have her life ruined because no one decided/wanted to help her.
This answer contains spoilers… (view spoiler)[I kind of saw this coming from a mile away when Skye was only briefly introduced. It is mentioned that Skye used to be much different. That some time between middle and high school, her appearance completely changed. It is, also, mentioned at the end that she had grown good at avoiding everyone. Skye shows many of the same warning signs as Hannah did. With Skye, it is likely that she suffered a more clinical depression. Such depressive disorders can be slower in manifesting, but the suicidal ideation is still a symptom. After listening to the tapes, and slowly piecing Hannah's life together, Clay realized that in his infatuation with Hannah, and because he was growing apart from friends (and doing so was normal), he hadn't thought much of the changes in Skye. When, really, they were signs, too. (hide spoiler)]
Chassity Oden since he was not able to save Hannah life he wants to try to save Skye's so she does not have to suffer the same way she did.
Christine He saw her on the bus and the story kept pushing the point that she looked down all the time and avoided people, which are usually signs of depression. Clay probably saw these signs that Skye might be suicidal and, since he knew Hannah might've been saved if she had someone who reached out to her, he made an effort to reach out to Skye in case she needed help.
Junius Moore Its because when he walked past her, he noticed that she showed signs of suicide and he was trying to reach out to her.
Aditi Kumar Skye's character shows signs of depression, and maybe he thinks she's also asking for help in ways like Hannah did. He finally understands what might be going on...or that something is up.
Anna clay saw an opportunity to save her unlike Hannah. It was too late when he realized when his chance was.
Rene He had mentioned Skye earlier in the story saying that he liked her, because of what happened to Hannah he decided to talk to her.
Courtney Tonks It's how ever you interpret it... She's the girl from the bus, the one that changed, the one that nobody really spoke to.. I guess he figured he lost one person he never got to know better..
TORI RODRIGUEZ Skye was Clay's young crush. He noticed the same characteristics about her as he did with Hannah
Sandeep Dalmia so that the things that happened with Hannah must not get repeated with Skye.. Hope Clay Helps her..
Beyond my thoughts
This answer contains spoilers… (view spoiler)[Basicly, remember Skye changed very suddenly and started to avoid company, and wear gray clothes? Remeber Hannah mentioned that a sudden change in a person could be a sign of suicide? Well, my guess is that after listening to the tapes, Clay read the signs and saw that Skye had some sign of suicide. Remembering that he couldn't save Hannah, Clay rushed to help Skye. (hide spoiler)]
This answer contains spoilers… (view spoiler)[Clay knew she was in turmoil just like Hannah. Yes, it was nice of Clay to reach out to be her friend but...... Come on!! Wasn't the premise of the book to recognize signs and actually do something about it? Clay seemed most aware of this yet he didn't bother to tell anyone about Skye's numerous stripes on her arms from self harming, cutting. (hide spoiler)]
Danika Both Skye and Hannah show signs of depression but Clay didn't see how Hannah was depressed until she was gone, so Clay doesn't want that to happen to Skye.
☇Briannan∞ Like everyone else has said, I believe it's because he saw a lot of Hannah in Skye, behavior-wise, and he knew he missed out on his chance at helping Hannah, so he was ultimately using Hannah's story to help someone else. I think it also showed reflection to the parts in the book where Clay would think about how hearing the tapes would change their lives & Clay was using Hannah's confession as a way to step out of his comfort zone/ his shell. Not to mention, Clay stated earlier in the book when they were on the bus together that he used to have a crush on Skye when they were younger, so I definitely think he was reflecting her situation back to Hannah & his crush on her.
Zina Bektache I think because she was going through the struggles Hannah gone through and this time Clay noticed
Manaal Wajid OMG Graciela I didn't even notice that Clay saw Hannah in Skye in that way................. :O