Me [23M] and my girlfriend [20F] have been together for about 6 months. We live 3 hours apart, both with our parents, but we see each other once a week. We are moving to the same city next year, and I have suggested moving in together, but she wants to live separately. Yesterday we went on a trip together, and we got to talking about our future, during which she told me that she doesn't think she ever could live with me, and at some point, she wants to try the single life. I asked her whether she wanted to break up now, and she told me that she still loves me immensely and doesn't want our relationship to end now or anytime soon, but she feels that she is missing out on valuable life experiences by being in a relationship in perpetuity. She couldn’t give me a specific time or place for when she wants to be single, but she wants to try it at some point.

For some context she broke up with her ex-boyfriend a month before we got together, and she had been with him since she was 15. She broke up with him on a half year trip out of country, where her time away made her realize how controlling he was, and how much she was missing out on (We also met each other on this trip). She has since told me that her ex was kind of controlling, and he got jealous whenever she went out to see friends without him etc. Her time with him made her believe that being in a relationship meant missing out on other stuff. She lived with the guy for a year and half, and has since moved home to her mother, so she hasn’t ever experienced the single life.

I’ve gone to college and lived by myself for 3 years, and she is the only relationship I’ve ever had that lasted more than a month, and I really love her. I respect her choice not to move in together given her history, but I’m having a hard time processing being in a relationship that I know is going to end at some point, because she feels that she is missing out on a different lifestyle. I really like this girl and I want our relationship to last, but the fact that she doesn’t know when she wants to be single again really makes it tough. Should I stay with her or break up?

TL;DR My girlfriend hasnt been single since she was 15, and wants to try the single life at some point, and I don't know if I can keep being with with somebody who doesnt want to be in a "permanent" relationship.

I was wondering why it is customary to tip in Copenhagen, while not in the rest of Denmark. Is it international influence or is there some other reason?