The relevant events are what I was looking for, really, so thank you for clearing that up.
I would agree with all the posters who advised you to give up the accent, because it might make you a target for teasing. You say that no one really cares, though, and that a few girls even like it, so maybe you shouldn’t worry about it too much. In fact, focusing on it may make it even more difficult to lose the accent. Maybe if you just relax about it, it will fade over time.
You have to wonder about the quality of this supposed British accent, though. I have seen people here suggesting that Madonna now has a British accent. Let me tell you that she most certainly does not - to a Briton she merely sounds like an American who has lived in England for a while, that’s all. There are other celebs, like Terry Gilliam and yes, Paul Gambaccini, who have lived and worked in Britain for decades, but are still considered American because of their accent. If that’s what the OP means by “British accent”, they shouldn’t worry about it. It is an American accent with a hint of British, that’s all, it will soon fade.
My grandma has a very strange accent; I guess it’s an older French-Candian accent or something. It sounds a bit British, but has a distinctive sound to it. My mom has a bit of it too. And so do I, when I’m tired, as it was my mom who basically raised me, and we spent quite a bit of time with my grandma.
I used to have it almost all the time. Teasing in 7th grade got it right out of me. I’m still REALLY self-conscious about it; I’m always asking people “do you think I have an accent?”
I’d say drop the accent. It’ll save you grief. Besides, you’ll probably (re)pick up your native accent soon enough.
An English guy in your hall? And after three days you start thinking with an English accent? That’s incredible. He must’ve been a hottie.
Just pray you don’t get stuck in an elevator with an Eskimo. You might emerge thinking in Inuit. 
Seriously, forget the accent and get on with your life.
What Palewriter said.
I’ve lived in London almost half my life, the other half in Oklahoma. My accent is seriously twisted. The Brits think I have a strong Southern accent (pah!) and Americans think I sound English. My British friends like nothing better than to get me to say “squirrel” - I say sqwrrrrrrrl, they say squi-rel (not good with the phonetics but hopefully you get the idea).
I’ve given up. I speak the way I speak, and sound the way I sound - I’m sure there is an island somewhere between NY and UK where my mid-Atlantic accent won’t be made fun of. But til I find that isle, I keep both sides of the ocean entertained.
There is nothing more pretentious than trying to sound English (I have to modify my bizarre accent depending who I’m speaking to). Speaking like your folks, and your mates, will save you lots of trouble and probably several black eyes.
Bleh… do whatever you want, man. You wanna hear about problems? I’ll give you problems… grumble
AngelicGemma should know better, we don’t play soccer, we play football. And before any of you start, American “Football” is NOT football, as far I can gather it’s more like rugby for wimps. But it’s definatley not football. But as for the accent, drop it. You’re not British. You never will be. Deal with it.
“But as for the accent, drop it. You’re not British. You never will be. Deal with it.”
“You wanna hear about problems? I’ll give you problems… grumble”
Is there a need to be rude here?
Just ignore them. The blokes wouldn’t know a bloody problem if it hit them in the bum while they were on the loo. Daft cunts couldn’t tell left from centre if they had a colour-coded chart.
It’s called sarcasm, it’s a thing we have in England, along with the Queen and red London buses.
And I’m a bloke now?!
repeat after me…
The rain in spain stays mainly on the plain…
again…