After 4 years of living togheter with my ex girlfriend yes, even if the one who said it first was me, it was an incredible pain.
When you trust someone so much to give your soul to him/her is very easy to get hurt, but i think that trusting others is the best thing ever, so it worth the pain if it goes bad.
Who decide to "Not love" after suffering from love have forgotten how amazing is when you love someone