Of course, practically everyone in the K-pop fandom KNOWS that 사랑해 is one of the first words you learn! But, it's never bad to get a refresher. 사랑하다 is a verb made up from the noun 사랑 [love] and the verb 하다 [to do]. 사랑하다 is often presented in present tense form as 사랑해(요) [사랑하 + 여요].
Let's look at some examples from how the word is used in various forms in K-pop songs.
K-pop song sample sentences:
"우리 사랑했잖아!" (B.A.P. - It's all lies) We loved each other! / We were in love (you know).
"그 새끼는 너를 사랑하는 게 아냐." (G.D - That XX) That guy doesn't love you! / That isn't love!
"사랑하면 안돼요." (Lee Seok Hoon (I Miss You OST)) We can't love. / It's not OK for us to fall in love. / Don't love (me).
Another sample sentence:
"사랑하는 우리 엄마한테~" To our beloved mother...