How well would you fare if you had to let the love of your life go in a If you love someone set them free situation?

Someone asked the meaning of If you love someone, set them free yesterday, and it’s still bouncing around inside my head. If you had someone you loved with all of your heart and soul, and you made the choice to let them go, how would you manage? I’m thinking I’d step in front of the next eighteen wheeler I could. I think a follow up question might be what does that say about your relationship with your S/O? So, could you let your S/O go, and then what would you do?