Sentence:  It comes to you that probably he did feel that way to let you use him like you did when you could n't have Gratt Shafer ; that he must have since he was there like the <WSD>radio</WSD> for you to turn on or snap off when you got tired of him , that other guy . 
Meaning of the word marked with <WSD> tags:  an electronic receiver that detects and demodulates and amplifies transmitted signals