Yes, you can end a sentence with ‘so’. In informal English, it’s quite common to use ‘so’ at the end of a statement to imply that there’s more to be said or to create a sense of continuation or emphasis. For example, if someone asks how your day was and you respond with, ‘It was fun, so…’, it suggests that you might want to elaborate further.
Additionally, ending with ‘so’ can convey mood, urgency, or a casual tone. However, in formal writing, it’s often better to avoid trailing off with ‘so’ since it can seem incomplete or vague. Therefore, while it’s grammatically acceptable, the appropriateness of using it at the end of a sentence largely depends on the context and the audience you are communicating with.