Why does unconditional love in Heartfulness jump to past betrayals and resistance?

When the guide suggests feeling unconditional love, my mind immediately jumps to past betrayals and hurt. I can’t let go of the emotional guarding. It’s like my system is programmed to resist vulnerability. My name is Priya, and my Birth Details are 21st November 1993, born in Chennai. Time: 10:45 AM. I’m wondering if this strong resistance to deep feeling is an old way of acting that keeps repeating in my life.