Thanks for being so honest, JonLaw.   I have been disappointed in my life as well.  I have had friendships and that has helped me.  I am also bored quite a bit - but a lot of that has to do with my heart failure and lack of energy (etc.)
I have had some great experiences also.  My experiences and interesting conversations are the most fun I have had as an adult.  
Being a young mom was my favorite time.  My daughter is now 15 and our relationship is more difficult.  This phase is very tough for me - maybe my worst.