I sometimes feel too old for this web site
What makes you think you are too old for the web site?
It is a bit boring to me now. I used to love going on there at first and I hope it keeps going. There are still some amusing things on the site that I like.
If a website bores you and seems to be less mature, then continuing to use it is a poor use of your time. Search out new sites that are more age appropriate.
I'm not getting old...
The content might be too young for you since you have grown up. You shouldn't use the site if you have grown more mature for it now. There are other sites that could give you the same feelings.