As a calm, balanced person with a suitable amount of self-esteem and a low level of neurosis, I’m happy to receive what you’re about to say in the way you intended it: as a compliment.
Let’s say you’re my friend, and we’re at a party together. You should tell me, “You look nice! I like your outfit.” Don’t worry, I don’t have the superpower of detecting any slight, unexpected emphasis on the word “I.” You like my outfit. Unlike everyone else. I won’t assume everyone is going around this party whispering about my bad outfit.
Or, maybe you could tell me I look nice and ask me where I bought my outfit. I will take this to mean you might buy it for yourself because you like it so much—not that you might buy it for your grandmother because Nana and I have the same style. I definitely won’t wonder if you asked this as a test, because you can’t believe I found such an unfashionable outfit at a store that still currently exists.