Welcome lovetoswim , I don't know if you're male or female, but regardless, there's been some really lovely comments here from people, including our resident comic Gary O.. who is only half kidding in this instance.
It does seem if you have what others don't have that you've missed out somehow, but what others?.. for us who've been married, had children, owned homes and cars... a life like yours and so many others like you, can also seem like heaven for all the reasons GaryO wrote...
High mortgages, kids who don't appreciate everything you've done for them, divorces and widowhood as stated by Radish rose... .
if you have decent health...take the excellent advice of Seabreeze, and try and enjoy what you have...and don't worry about the things you don't have.
remember the old adage about being careful what you wish for...
Happy 65th Birthday to you whenever that is... .. and many more, and now you've found new friends here perhaps this will be a start to a more uplifting life for you...