Langston Hughes goes simile crazy

Langston Hughes tries to explain or examine what happens to a dream not lived or deferred. I thought it was a little curious that Hughes chose the word "deferred" instead of "unattained" or another word that meant incapable of being reached. It gives me the impression that Hughes isn't talking about crazy dreams: but rather, he's talking about dreams we put off or defer. I think he is sort of saying that all dreams we have are attainable, but we only put them off. He ponders what happens to these dreams we leave out "does it dry up/ like a raisin in the sun?" Sometimes we put dreams off to much and save them for a more stable and clear time in our life that we never get back to them. Then, they get dried up like a raisin. They are still good, but lose the fullness and sweetness that a fresh grape has. This is only one of the scenarios Hughes offers in the entire poem that is similes. Does it sit and just stink (meat)? Or get better (syrupy sweet)? Does it burden us (heavy load)? Or eat us up inside until we explode?