Well in chinese "感到" is a verb, it's equal to the word"feel". while “感情” is a noun,it's equal the word"emotion" or "affection. if you're still in doubt, just comment here and i'm glad to help u :D

感到 is verb means feel .（ For someone or something） For example: I feel tired.我感到很累 I'm so sorry to hear that.我感到很抱歉，听到这个消息 感情 is noun means emotion; feeling;(About relationship for lover，couple，freind and so on ) For example： He dont thinking of her feelings.他没有考虑到她的感情 Although she did not reciprocate his feelings, she did not discourage him. 尽管她没有回应他的感情，她也没有使他丧失信心。

感觉感觉 感是身体的 觉是思想的 我感到怎么样是在说外界环境对我身体的影响 是用身体来感 我觉得怎么样是你对某些事情的看法 是有你的思想来觉 感觉是用身体和思想一起来