go and ask questions in the forum about learning it ("opiskele suomea / learn finnish"

don't hesistate to start a new thread (hehe, it'll make this forum look more crowded

)
but, i'll translate these in to formal language and / into spoken language (my accent hehe)
I like you
pidän sinusta / tykkään susta
I need you
tarvitsen sinua / tarvitten sua
I'm lucky to have you
olen onnellinen koska minulla on sinut / oon onnelline ku mulla o sut
and the obvious one: I love you, might be usefull in a while to.
Rakastan sinua / rakasta(n) sua