Think of a time in your life when you experienced such an expansive feeling that it felt like your heart would almost burst out of your body!! Perhaps this was the birth of your children, that first kiss, an awesome sunrise or sunset.
That feeling was amazing but unfortunately it happens far too infrequently. Often we embody obstacles to experiencing love due to the opposite experiences. Perhaps a fearful, disappointing, hurtful situation occurred causing us to protect our heart by thinking it is not safe to love. That is a natural reaction, you are not alone.