How does Percy feel about Grover?

Grover is Percy's best friend, so he feels good about Grover being his friend.

Explanation:

In the Percy Jackson Series, it says that; which I have read.

When they first meet, Telemachus is unaware it's Odysseus since he is in disguise to hide from the suitors who wish to marry Penelope. But afterwards proving to his father that he is in fact his son by reminding him of the three he planted for his son, they briefly and joyfully rejoice, and then plot to end the suitors' lives.