To say "I want to go" in English, you can say "I want to go" or "I want to leave." The phrase "I want to go" comes from the English verb "to go," which means to move from one place to another. Here are some examples with Chinese translations:
I want to go to the store. 我想去商店。
I want to go home. 我想回家。
I want to go on a trip. 我想去旅行。
I want to go to bed. 我想去睡觉。