I had some friends who are in a relationship feeling the same
way too. The moment the word commitment is mention, they would juz
say that " Aiya, just enjoy the time we have together la, why think
abt commitment?" Perhaps to them to commitment means having to
sacriface a lot of things like freedom and their time for the
relationship. Guess your ex wasnt ready for a serious
relationship..Can understand that, because some guys have the same
mentality as your ex.