Why is it so hard for BF to say "I LOVE YOu"

Have you ever wonder why it is really hard to have your boyfriend to say "I love you"? You may think they don't love you or you may start doubting them. In real they just don't wanna break your heart that much.

I will explain why, what is love? According to the Bible:

Love has long patience long-suffering, it is kind. Love knows neither envy nor jealousy. Love is not forward and self-assertive, nor boastful and conceited.It is not rude, it is not self-seeking It does not demand its own way. It is not irritable it is not easily angered,does not take into account a wrong suffered neither does it entertain evil thoughts, does not rejoice in unrighteousness, but rejoices with the truth;Love bears and protect all things, believes and trust all things, have faith all things, endures all things.Love never fails: but whether there be prophecies, they shall fail; whether there be tongues, they shall cease; whether there be knowledge, it shall vanish away.

1 Corinthians 13: 4~8

As a normal human being who lucky to be a boyfriend to a girl, he has so much things to fulfill. How can we say it so easily?

If a person say "I LOVE YOU" so easily there is 2 possibilities,

1. He LIED to you!!!
2. You just met Jesus Christ