<human>: I [25F] have just broken up with my boyfriend [29M] of four years, because I felt like I couldn't marry him and I have had this unsettling feeling we weren't not meant to be together. 

Please see my other post for clarification on what I am talking about 
 

I thought I would feel like I was doing the right thing, or at least a feeling of peace about this, or that I had finally validated how I felt. But I don't. At all. I feel desperate and sad and I wish I could go back in time and not break up. I am promising myself one week of not talking to him to try add clarity. But I am wondering, those of you who were in a similar situation; ie. I don't know what I want to do, I feel like we should break up despite how great of a relationship we have, I feel uneasy about committing to the relationship ect. Did you feel good about your choice after the breakup or are my feelings telling me I made a mistake.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: advice/experience on those people who broke up due to feelings that they shouldn't be dating their partner. Did you feel good right away about your choice or not and how did you know if you made a mistake.