To dream of a cousin represents a quality in yourself based on your most honest feelings about them. Ask yourself what memories or feelings stand out the most about them and see how that quality may apply to your own life.
To dream of someone being your cousin who isn't really your cousin represents situations, realities, or problems that are difficult to detach yourself from. Feeling that you can't do anything about something having to be acknowledged or accepted.
Positively, cousins you aren't really related to may reflect mandatory respect, acknowledgment, or acceptance being given to you. Having your "foot in the door" or a minimum requirement met that gives you the right to deserve something or be listened to at all.
Example: A man dreamed of seeing his cousin. The quality that stood out the most about this cousin was her courage to confront problems. In waking life he finally built up the courage to yell at a greedy family member who was not returning a favor when he needed it the most.
Example 2: A woman dreamed of taking a pregnancy test with her cousin. In waking life she was fearing being judged for taking a pregnancy test. Her cousin was someone she felt was judgmental.