The relationship between Gene and Finny changes and evolves, influenced by actions and consequences and filtered by changing perceptions. The changes are frequently by-products of Gene's insecurity and his constant self-evaluation.
At times, Gene and Finny are the best of friends, sharing adventures and feelings with complete openness and honesty. At other times, Gene considered Finny to be a rival and a detriment to Gene's ability to all that he could or hoped to accomplish at Devon.
you can't come to the shore with just anybody...at this teen-age period in life the proper person is your best pal...which is what you are...up like a detonation went the idea of any best friend, up went affection and partnership and sticking by someone
After Finny's fall, Gene's remorse consumes him and he eventually becomes Finny's surrogate, taking part in the activities that his action at the tree took away from Finny.
if I can't play sports, you're going to play them for me," and I lost part of myself to him then, and a soaring sense of freedom revealed that this must have been my purpose from the first: to become a part of Phineas.
Eventually, Gene makes peace with himself and what he had done to Finny, but he never forgets the lessons he learned or the impact Finny had on his life.
I was ready for the war, now that I no longer had any hatred to contribute to it....Phineas had absorbed it and taken it with him, and I was rid of it forever.