My mother doesn't approve of my traveling with my boyfriend.

This shows that your parents don't know your boyfriend well enough and don't want to hand you over to him easily. In addition, it is out of protection and concern for you. I hope you can understand their hearts, communicate with them more, and explain your itinerary to them one by one. If you really go out, call or send text messages to let them know your whereabouts, or talk to them about the feelings of the day at night. This will make them feel more at ease and lay a good foundation for your next trip.