It depends on whether "I" is a male or female.
Male: Ayfo hagavar she-ani ohev (איפה הגבר שאני אוהב)
Female: Ayfo hagavar she-ani ohevet (איפה הגבר שאני אוהבת)
to a man: אהובי (ahoovee) to a woman: אהובתי (ahoovatee)
I love you my friend (male to male): aní ohév otchá, chaverí (אני אוהב אותך, חברי)
The Hebrew word for "love" is "ahava," pronounced "a-ha-VAH."
There is no Hebrew word for Valentine, but you could say: "Do you want to be my love" to a man: atah rotseh lihyot ahuvi to a woman at rotsah lihyot ahuvati
the man = ha ish (האיש)
ahava po (אהבה פה)
if you are male, your love = ahava shelkha if you are female, your love = ahava shelakh
for secular new years, you would just say "happy new year" to a Jewish man.
beh-ah-hah-VAH (באהבה)
ahavat re'enu אהבת ×¨×¢× ×•
אני אוהב אמנות
ahavat em (אהבת אם)