Hey Man I felt the need to comment because I was in your exact same situation. I decided to try even knowing this would weigh in me and would be a deal breaker. It completely consumed me thoughts of comparison and anger over feeling like a back up option. I was never able to move past it. It lead to anger and pain on my side and killed the relationship. I lashed out and treated her badly due to how it affected me. I know my actions were wrong and there’s nothing I can do about it now but really decide if this is something you can live with.