I feel like we are constantly on a treadmill where what we truly want is just beyond reach and when or if we reach it,  we want something else.  My dad use to say that I was never satisfied and it was one of the things he wished he could fix.  What makes us this way?

I can see where I do that.  I am currently in a relationship with a good guy, who is loving and always there for me.  I mostly think that things are great but it seems like I always want more.  Sometimes, I feel like our sex drives are not compatible.  I am not a freak but once or twice a week is perfect for me, where he can go for weeks.  I think the longest has been a month.  Then he'll be crazy about it for a week and we can do it as much as 3 times in one night.  What is it?  I wonder when he's like this, what the difference is.  Is it me, something I do?  Is it someone else?  I wish someone could shed some light on this subject. 

I am working hard not to look back and compare him to a previous relationship.  It would not be fair to him, he has some great qualities that I would not want to change.