I'm ashamed to be 28 and still really into gaming.
Nothing to be ashamed about.  There are lots of people much older that are still into gaming.  If you're really good you could actually make money on it!
I know I shouldn't be, but I feel like I should focus more on my career, and gaming is definitely not it.
Hahaha.  Nothing says you can't do both.  Work at work, play after work.