How to say 'I love you' in Spanish: Te quiero. Repeat after me: Te quiero. There's another way to say 'I love you' in Spanish, and it's more used for romantic purposes; when a couple is really in love and you're in that initial stage of courting and dating. You would say, "Te amo." Repeat after me: Te amo.
If you want to say something like 'I love you, Susan', you could say, "Te amo, Susana." Repeat after me: Te amo, Susana. If you just want to say 'I love sports', you could say, "Amo los deportes."
You can use these 2 words, 'quiero' and 'amo', with pretty much anything you can think of.