"If there are certain times you don't hear from them, they may be involved with someone else," Kimberly Hershenson, LMSW said to POPSUGAR. Likewise, if they always seem to message you back or call you at the same intervals of time, it might be when they are away from their family and have space. If they won't speak to you late at night, for instance, it could mean they're busy with someone else.