POINT 1
In the Bebi Bejiita saga, Gokuu had finally driven Bebi out of Bejiita's body. Bebi tried to get away when Pan noticed him.

Pan: Grandpa! he's getting away!!!

Gokuu: Never mind him! Go check Bejiita first!!

Then Gokuu flew over to see how Bejiita was doing and they gave each other the sweetest smiles. I always wonder why no one in the show comments on that. They only seem to smile that way around each other. Bejiita especially.

POINT 2
Bejiita actually worries about Gokuu a lot. Earlier in the series he couldn't care less what happened to him. But all that changes. He tells Gokuu he should take care of himself. He constantly ran to Gokuu's side when there was danger. During the Evil Shenron saga Gokuu had just swallowed a dragon ball and started choking. Bejiita screamed his name and ran over asking him of he was alright. He put a hand on his back and told him just forget whatever you were doing and spit it out. He was really worried. It was so sweet. *.*

POINT 3
Whenever Gokuu and Bejiita are together they seem to forget everything and everyone around them. During the Evil Shenron saga for example Bejiita had just gone SSJ4. Isshinron was about 3 feet from them and 1 second away from killing them both. Isshinron is technically the strongest baddie of all 3 series. But they somehow forgot this. They were too busy admiring each other, to care about him. They did this 4 more times during that saga. Eventually Isshinron got sick of being ignored.

POINT 4
In the end of GT Bejiita thought Isshinron had killed Gokuu. He said the very last thing he would do with his life was avenge Gokuu.