Can a girl travel with her boyfriend's family if she is not engaged?

Sure, but only if you are invited to the man's house. If there is, you can go, which will promote feelings and impress his family! On the contrary, it's best not to go, because his family will be embarrassed if they don't know that you are going, and they will think that you are very unstable! After all, girls! Think about it and decide carefully! I hope it helps.