I saw reason at the age of 26 to get a degree, and now at the age of 32 I have just received confirmation of my BSC two days ago. If I could have my time again you bet your arse I would do the degree at 18 years old! Someone is giving you the chance to obtain your first achievement in the field of computing, so don't waste it.
If the games thing doesn't work out, then a computing degree is still something to fall back on in hard times. There might come a time when you desperately need to get any job just to put food on the table. One of the reasons I have my current job is because I was studying at the time for a Degree - my boss told me that it suggested I wasn't as stupid as I looked and took pity on me! o_O
LOL, one of the best moments in my job was when someone noticed me using a computer and asked "who was stupid enough to let you loose on our computers?", and I replied with "for your information - you fucking ignoramus - I have a University Diploma in Computing! So do put that in your pipe and smoke it! Now if you'll excuse me, I will get back to hacking into the Ministry of Defense's mainframe...". Trust me, those moments are priceless...not to mention bloody hilarious for everyone watching.
But anyway, go get your degree.
![^_^](http://public.gamedev.net//public/style_emoticons/<#EMO_DIR#>/happy.png)