Could you be expecting too much from people? Often one encounters very few people that you make a real connection with. You have to put up a pleasant front that encourages people to be nice to you and you try to be nice to them right back, sometimes they are and sometimes not, so it goes. From time to time you meet someone exceptional, you just have to stick at it investing as much time and energy as you feel fit, learning as you go. I don't really like people and am basically unsociable, but neither do I want to be isolated!