I want an open relationship but my partner doesn’t. I love them and we’ve been together for 3 years but I just don’t know what to do.
Every relationship will inevitably face a divergence in wants, needs and desires. The key skill to master to overcome these issues is communication. Sitting down with your partner and clearly stating what you want from the relationship is the only way you’ll be able to deal with the issue.
While you may feel that you want an “open” relationship, and you partner desires complete monogamy, it’s worth considering that relationship “openness” operates on a spectrum. Discuss each others boundaries and what is and isn’t acceptable, you may be able to reach a compromise.
I’d also highly recommend reading a book like The Ethical Slut for a more in-depth understanding of consensual non-monogamy.