I'm interested in human emotion. Particularly, we have many words for different emotions, such as love, hate, etc. The issue arises that I have not found words for some of the emotions I've heard my friends describe and which I too have felt. These feelings do not appear to be accessible to everybody, because I have spoken with numerous people and only two of them so far have not met me with a blank stare or tried to fit my description to commonly described emotions like 'love' or 'anger'. Generally, the emotions are much more complex than the behaviours those words entail
For example, one of these feelings is the sensation of something missing, the sensation that there's more to life, and which embodies itself as a sense of vague, omnipresent dissatisfaction. Both I and a friend of mine have had this sensation and when we are happy, it is still there. If we think about it, it easily sobers the sensation of happiness, but at the same time, it is 'deeper', for lack of a better term, than standard emotion because it does not exclude other emotions.
Another such emotion, which does not seem to have a name is one I have experienced. It is a strong sensation of attachment to a girl who I used to date. We broke up, but remained friends, and I weathered through the resentment to keep the friendship because she thinks in a similar way to me. The sensation is very strong and brings to mind the idea that, regardless of what happens, I want her to be happy, whether we date again, remain friends, or become strangers. It is not an urge or compulsion to action, and like the sense of dissatisfaction, is omnipresent. It is also not linked to her presence or absence. Perhaps empathy or respect is the best word for it.
I'm curious about the terminology for sensations that exist only in relation to a mental concept and nothing tangible. Largely, it seems that language is inadequate to convey feelings of this kind, but I'm intensely interested in the terminology that may exist for these sensations. There are more of them, and they generally correspond to simpler emotions and concepts, but they have a very distinct and complex nature when compared to both the sensations and behaviours associated with those simple emotions.
Are there words to communicate these feelings without grossly simplifying and misrepresenting them?