他其实早就已经猜到了，只是和Summer相处的时间越长，他越是不愿意承

他其实早就已经猜到了，只是和Summer相处的时间越长，他越是不愿意承认了而已。

Results (English) 1:

He had actually guessed it a long time ago, but the longer he spent with Summer, the less he was willing to admit it.

Results (English) 2:

He had already guessed, but the longer he spent with Sumer, the less willing he was to admit it.

Results (English) 3:

In fact, he had already guessed it, but the longer he spent with summer, the more reluctant he was to admit it.