Formal:
* "Rwy'n dy garu" (pronounced "rwee'n duh karoo") - This is the most literal translation, meaning "I love you". It's a very formal way to say it, often used in writing or in more serious contexts.
Informal:
* "Dw i'n dy garu" (pronounced "dwee'n duh karoo") - This is a slightly less formal version of "Rwy'n dy garu".
* "Cariad" (pronounced "kah-ree-ad") - This means "love" but it's often used as a term of endearment, similar to "love" or "honey" in English.
* "Dw i'n dy garu di" (pronounced "dwee'n duh karoo dee") - This is a more affectionate and personal way to say "I love you".
Other options:
* "Rwy'n dy hoffi'n fawr" (pronounced "rwee'n duh hov-ee'n vahr") - This means "I like you very much". It's a less intense way of expressing affection than "love you".
Important Note: In Welsh, the order of words is different from English. For example, "Rwy'n dy garu" literally translates to "I you love", but it's understood as "I love you" in Welsh.
The best way to say "love you" in Welsh depends on the specific situation and your relationship with the person.