Reasons why Relationships fail to work and do not live up to expectations: Bad Dynamics

This note was actually requested by a close friend after I was annoyed and venting on the phone.
People wonder why their relationships do not work. Part of this is due to the Dynamics of the relationship. Often in regards to friendships.

Example:

Girl meets guy in a club, they flirt and exchange numbers (1on1 interaction)
Girl and guy flirt on the phone (1on1 interaction)
Girl and guy have coffee, see movie (1on1 interaction)
Girl and guy hang out (1on1 interaction)
Girl and guy begin dating (1on1 interaction)

This is often the basic framework for the initial period in dating. So what causes the problem with external friends? Simple. Dynamic changes

Girl and guy go to club, guy meets girls male friends (1on5 interaction). Jealousyusually then occurs because both partners have never seen the other in a situation where the same and opposing genders exist.

How to avoid, be transparent. if you value your friends, then make your possible partner meet them first so respect and a mutual understanding develops.