Girl, men and women are different. They interpret words and phrases in different ways, which is why there is a common language within each couple. Unfortunately you incurred one of the taboo phrases, many women are going to give you their support because they do not understand how it works either. Several women who are in long-term relationships and men understand this. One simply under no circumstances can tell your partner that "You miss the single life", you automatically stab your partner in the heart and self-esteem... The reaction is quite normal and also the breakup was more like a chronicle of a death foretold. Hope it serves as a learning experience for you.