君に会いたくて死にそう。 君に会いたくてたまらない。

typically "sabishii" is used to mean "to miss s.o.". it literally means "lonely". i'm not sure what name's appropriate for the person you're talking to. "kimi" is usually used for significant others, "anata" is for strangers or husbands. for a friend, you usually just use their first name with the "san" honorific. so maybe "sabishkute tamaranai" is an appropriate form.

Lolol... 私はあなたひどくを欠場 doesn't make any sense. It's a Google translate or something?