Ask him to share his problem and not to worry that what other classmates will think of that or talk behind him.... Just make him feel confidence in himself.... If it won't work talk to his parents or teachers about it.... I know this is an ASL topic..
you: Hi! you are absent since 4 days what happen? I think you are not well! Are you?
he: No! just a little busy I was...
you: Don't lie to me... Share your problem... may be we get any solution about this!!
he: Ah! I'm not well! My health is not stirred.... It makes me feel unconscious and uncomfortable in school.
you: Don't worry we'll talk about this to teachers or your parents buddy!!
he: Oh! you're so good... Thanks for helping me
you: No problem... I'll also help in your pending work.... Let's go to teacher..
HOPE THIS HELP YOU PLZ MARK AS BRAINLIEST.....