Why are women built like this

Like even when it is the dumpee, or the dumper, women always tend to move on quicker, and never reach out even though they ended it off and the relationship was good. Like I literally don't know why is the dynamics like this? Makes my heart go weak. After this incident, it really makes me think eventually women tend to lose feelings, then what is the use of putting so much efforts to save a relationship.

She broke it off with me after 3 years, said "she lost feelings for me", and now she literally is having the time of her life, clubbing, drinking, and I’m here hurting all alone.💔

I really do not have any vengeance towards any women out here, infact I liked speaking with women in my entire life, only until she decided to break it up with me.

I'm sorry if I've hurt someone