Guess I'm just afraid of their reaction. That is a personal flaw of mine.
I recently forcefully ended a relationship, that I felt was pushed upon me. It was tough, as I didn't particularly dislike the other person, but realized I couldn't match their feelings and felt like betraying them by continuing the relationship. So I said some mean things in hope that by sparking their anger, they could overcome the sadness more easily.
When I was in elementary school, I had a close friend. We goofed around all day and were hero buddies fighting imaginary dragons in the school yard. One day he announced, that his family was relocating and that he had to switch schools. We swore eternal friendship and thus I never heard of him again.
Things like this happen. People are involved in all sorts of business and quickly lose former bonds when exposed to enough new experiences.