Free Ignis (Book 2, Pure Series) by Catherine Mesick

and Branden didn't know much about William, but I had an unpleasant feeling that they disapproved of him too.
                Simon continued.   "I'm sorry I've spent so much time with Irina lately.   As I said—she's a great girl.   I like her a lot, and I wanted to like her more—mostly because it seemed to be what you wanted."
                I felt a little pang of guilt when Simon said that.   I certainly hadn't meant to push Simon into a relationship that he didn't really want.
                "But Katie, I soon realized that I could never feel anything more for Irina than friendship.   And I also realized that it wouldn't be fair to her to pretend that it was possible for me to feel otherwise."
                I sighed.   I was certainly familiar with that sentiment.
                "And I have to tell you," Simon said, "that it's almost like you're under some kind of spell lately.   Things were going great between us until this William guy showed up.   And you know, I blame myself for some of this."
                "Simon, that's crazy," I said.   "You have absolutely nothing to be sorry about—"
                Simon interrupted.   "But, I do.   I really do.   I was hanging out with Irina, but the whole time I was worried about you.   I knew that you were in trouble with this—this William, and I did nothing.   You needed me, and I wasn't there.   And now you're in over your head with some shady guy from who knows where.   I've failed you, Katie.   And I'm sorry about that."
                "Simon, you've got this all wrong," I said   "I don't want to hurt you, but I'm really happy with William—no one could make me happier."
                Simon gave me a skeptical look.   Then he shook his head and smiled.
                "Okay, Katie.   I'll humor you.   For now."
                I looked around at Charisse and Branden.   Both of them were staring at me, clearly concerned.
                "So what about you guys?" I asked, though I feared I knew the answer.   "What do you think about William and me?"
                Branden looked away.
                Charisse pursed her lips.   She started to say something, then stopped.   She was silent for a moment, and then her words started to tumble out.
                "Katie, as much as I hate to say it, your situation is reminding me of my mom's.   I wanted to say something before, but I couldn't.   Some guy breezes into town out of nowhere and suddenly the two of you can't be separated.   You don't spend time with your friends like you used to, and you seem to be in a dreamy fog all the time.   And Katie, to be honest the few times I've been around William, I've gotten a really funny feeling around him.   It's a lot like the feeling I have around my mom's new boyfriend.   I think William is trouble too."
                "What can I do to reassure you guys that everything is okay?" I asked.
                "Listen to your friends," Charisse said quickly.   "Listen to the people who care the most about you."
                I felt frustration welling up within me.   That was not the kind of answer I wanted.
                I looked around at the three sets of worried eyes that were turned toward me.   "Can we change the topic, please?"
                All three sets of eyes wavered—I saw disappointment and fear flash across the faces that were turned toward me.   Charisse, Branden, and Simon all became carefully polite, even conciliatory.
                "Yeah, sure, of course," Branden said.
                "If that's what you want, Katie," Simon said.
                "Don't get angry, Katie.   We're just trying to look out for you," Charisse said.
                But I was angry with all of them.   William was different, and he couldn't