Here are three ways to say "I love you" in Spanish:
1. Use "te quiero" (tay kee-ehr-oh) in most contexts. This phrase is suitable for anyone, including family members, friends, significant others, and even pets. You can also add "mucho" (moo-choh) to the end.
2. Say "te amo" (tay ah-moh) only to a committed romantic partner.
3. Let your significant other know you love them with all of your heart by saying "te quiero con todo mi corazón" (tay kee-ehr-oh kohn toh-doh mee koh-rah-sohn).
