What makes you hate someone you loved?

Usually what happens is that we initially like someone's company and start liking the little things like laughing at your jokes, they hold your hand while you walk in public, they make you feel comfortable around you, they support you in every effort, etc., and we see that this is “Love” because it has a human tendency, especially for the opposite sex.

If some guys and girls start spending time together as a friend it satisfies one another and it becomes a routine to spend time together. When we don't meet this person, we feel like something is missing from their schedule. After this someone else will usually propose and accept the proposal and the relationship begins.

When we get into a relationship, we start keeping expectations from each other, calling and chatting late at night, tagging each other in pictures on social media, commenting more often, etc.

The hate part starts when a boy or a girl expects something from each other and when their interests don't match, they start hating each other. These expectations and disappointments keep popping up and we make up a mental picture of the person that person doesn't always agree with me.

Usually guys look for hooks and think that they are getting into the relationship that they are going to get physically and whatever it is, and at the end of that they hurt the girl emotionally.

Same with girls, they will be in a relationship with different people at the same time. The guys keep spending money and buying her gifts and the girl keeps using the guys money for shopping and various luxuries like food in five star restaurants etc.

All this leads to hatred for either the guy or the girl who was really in love with someone else.