you are beautiful-- tum sunder ho , (आप सुंदर हैं,) he is handsome---wo acch dikhta hai (can use "sunder" also)( वह सुंदर है,) i love you--- (mai tumse pyar karta hu) (मैं तुमसे प्यार करता हूँ,)(if she is saying then we will use "karti" if he is saying then will use "karta" i love your shirt--- mai tumhaari shirt se pyar karti hu,(but we uses this sentence as(mujhe tumhaari shirt acchi lagi), i am glad to hear that--mujhe wo sun ker khushi hui "or mujhe wo sun ker accha laga( मैं यह सुन कर खुश हूँ,) thank you--dhanyawaad (शुक्रिया)

ap sundar hain. vah sundar hai. mujhe apki kameez pasand hai.mujhe yah sunkar achcha laga. dhanyavad.

"you're beautiful"-aap bahuth sundar hai . "he's handsome (or good-looking)"-vo bahuth sundar hai. "I love your (ex.)shirt- muje aapke shirt pasandh huva "I'm glad to hear that" -muje aapse milkar kushi huee

beautiful=khoobsurat,sundar(as u are;) handsome=roopvaan i love ur shirt=tumhari kameez mujhe pasand hai glad=khushi "mujhe yeh jaankar khushi hui"

handsome and beautiful are the same in Hindi. tum/aap sundar/khoobsoorat ho/hain(u r beautiful). mujhe tumhara shirt (bahut) pasand hai(i love ur shirt). sun/jaan kar achchha laga(glad to hear/know that).