My gambit...

...on quasi-something situations.

Let "-->" be the direction of which happiness stems.
Let "(o'.'o)" be whom ever you happen to be quasi/ seriously hanging out with/ seeing/ dating. (Some people are very very particular about the definition and I share the sentiment, the implications can cause much disturbance!)

1) You --> (o'.'o)
2) (o'.'o) --> You
3) You --> (o'.'o) --> You
4) You <--> (o'.'o)
5) You -- (o'.'o)

Explanation of the above:
-------------------------
1) You make the other person happy.
2) The other person makes you happy.
3) You are happy due to the happiness you bring to the other person.
4) You are mutually making one another happy.
5) Lastly, my personal favourite, you tolerate each other.

Which situations do I find the most ideal? Personally, probably the combination of 4&5. Which situations are the most realistic? hehe, depends on when you ask. What spawned this little gambit? Do I ever have a reason? =)

Exactly.