Most Helpful Guy
1) by being more attractive than her, or paying more attention to him than she does. Like, a lot, but without being obsessive.
2) Ask if you can use his phone, call your own phone, answer your phone, say "Thanks, I'll text you later".
3) You can find him in the halls and walk with him to class.
Trust me, it's easier for girls to distract guys than the other way around.