To say "I like you" in Spanish, you can say:

• Me gustas (used when expressing romantic or affectionate liking)
• Me caes bien (used for friendly liking, like "I like you as a friend")

If you want to be more direct or formal, you can also say:

• Me gustas mucho (I like you a lot)
• Te quiero (I love you / I care about you - stronger than just "I like you")

Let me know if you want the phrase for a specific context!