In the OT, the characters really showed that they liked each other and came across as Friends. Han and Luke are joking around about Leia and then they have that great moment right before the Battle of Yavin when Han says "May the Force Be With You." Oh man, is that a great moment or what? And the way the three friends are embracing, smiling and shouting after the Death Star is destroyed is awesome.
In Empire there's a great scene which shows the Friendship between Luke and Han. Right before the Battle of Hoth, just the way they look at each other shows that they care about each other and the way Luke is so concerned about his friends on Cloud City.
The only person I was really convinced Anakin loved was his mother.