My fiance didn't propose properly even though it's my fault.
That's interesting, why do you feel this way?
I just felt really bad. I'm just overly sensitive.
It is normal to want to have your proposal be perfect and to remember it forever. So being sad that it did not go right is okay as long as you don't keep focusing on that.
I guess that's true.
It would be best to move on from here. Just look forward to the marriage and then that is something you can focus on that would put your mind at a more positive state.