Can you translate this for me in japanese?

Can you translate this phrases for me?

1. i really like you
2. Let's be friends?
3. I hope you understand
4. if you were mine
5. i hate you

thank you so much. It would help to have a romaji as well as hiragana/katakana/kanji writing both included.

1.I really like you.
'watashiwa anatano koto ga daisuki desu.'
2.Let's be friends?
'watashi to tomodachi ni natte kuremasenka?'
(the above line translates to more like, will you be friends with me?)
3.I hope you understand.
' wakatte kuretara ii desune'
(it literally translates to, It will be good if u understand.)
4.If you were mine.
I am sorry, i cant really form a proper sentence without grammatical error.
5.I hate you.
'watashiwa kimi no koto ga kirai desu.'
hope that helped