Well Said.
Relationships are not meant to last. Some end in 3 days, some end in 3 weeks, others end at death. A real connection can happen with someone you only know for a brief amount of time. That said, sometimes people are not meant to be with each other. Shit happens.
There's a difference between an instinct (i.e., you feel that person is lying, or something isn't right) and being afraid to be with someone out of fear of getting hurt or not being able to give yourself to that person. If the reason why someone is dropping a relationship is because they are not comfortable (with him/herself or people, in general) or its because they are afraid, then its time to be alone for awhile.