I'll tell you. See friendship is also like a relationship between two best friends. If your friend is bad, they steal your sleeps and when you're out of that friendship, you feel free, happy from the tension, so just like this you were in an unsuitable relationship for you so after your out of it you feel free and happy!
Because that's your gut telling you that you are in the wrong relationship here and you'll know when the right one comes along, so don't expect too much from these wrong ones as that's the best thing that can happen to you. Good luck and Merry Christmas