“The imperfect data that linguists have collected indicates that ‘I feel like’ became more common toward the end of the last century. In North American English, it seems to have become a synonym for “I think” or “I believe” only in the last decade or so. Languages constantly evolve, and curmudgeons like me are always taking umbrage at some new idiom. But make no mistake: “I feel like” is not a harmless tic. George Orwell put the point simply: “If thought corrupts language, language can also corrupt thought.” The phrase says a great deal about our muddled ideas about reason, emotion and argument — a muddle that has political consequences.
“Natasha Pangarkar, a senior at Williams College, hears “I feel like” “in the classroom on a daily basis,” she said. “When you use the phrase ‘I feel like,’ it gives you an out. You’re not stating a fact so much as giving an opinion,” she told me. “It’s an effort to make our ideas more palatable to the other person.'”
http://www.nytimes.com/2016/05/01/opinion/sunday/stop-saying-i-feel-like.html