Would you just leave him/her alone until they contact you? What would you do in this situation? please help

You meet the nicest girl or guy online.You guys become good friends and like each other very much,you guys chat online everyday and then suddenly he/she tells you that his family member got seriosly ill and that they would have to go abroad for treatment.He/she gets so busy but tries to reply to your email whenever he/she can.Would you send him/her an email from time to time just to make him know that you're there for them or would you just leave him/her alone until they contact you? no matte how much you miss him/her?
Would you just leave him/her alone until they contact you? What would you do in this situation? please help
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