really?.....I would suggest you review the "why" in all this.
Being happy with what you're doing. What type of a life are you striving for and in balance, what kind of a life do you want to live while you're on that path?
Also consider that tomorrow isn't guaranteed.
Comparing to others is inevitably a losing proposition.
There will ALWAYS be those that earn more, save more, have larger and multiple income streams, have much more invested, much more in real estate and other goods.....fill in the blank....whatever.
You might consider looking at yourself and the improvements you've made to reach your goals.
Isn't there something to feel good about there?
If this in any way is making you unhappy, ask yourself why.
It probably has more to do with self-esteem than anything else.
Do you compare yourself to people in many others aspects of life?
It's a shame when someone who appears to be visibly successful at an undertaking cannot view any of it with satisfaction.