Dear(同学,你没给我朋友的名字呢)
I‘msorrytohearthatyouhavesometroublesinstudyingandliving.Don'tworry,Iwouldliketogiveyousomesuggestions.
Firstly,yousaidthatit'shardtolearnEnglish.Ithinkyou'dbetterlistenandspeakEnglishasmuchaspossible.IfIwereyou,Iwouldreadsomenewspapersandmagazines.Also,watchingEnglishmoviesandlisteningsongsinEnglisharegoodways,too.Secondly,asyoumentionedintheletter,youhadproblemsgettingalongwithothers.Maybeit'snotyourfault,butrememberthatkindnesswillmakeyoumorepopularinyourclassmates.Finally,you'reworriedaboutyourweight.Inmyopinion,don'tpaytoomuchattentiontoit,keepabalanceddietanddomoreexercise.
Ihopethesetipswouldbehelpfulforyou.AndIbelievedthatyoucanovercomethesedifficultiessoon.Bestwishes.
Yours,WangHua