What are some real-world examples where people or technology had to deal with the effects of time dilation?

What should I do if my girlfriend of 3 years doesn’t want to marry yet? She asked me to wait 5 more years because she still wants to live with her parents. We’re long-distance, rarely meet, and things have been shaky. I want to fix it.
How did you manage to find a partner who met your expectations after refusing your parents' choice, and what advice would you give to others in a similar situation?