Anyway, I'll have a go at interpretting your dream but I can't say it'll be very accurate, it's just how it sounds to me.
The fact you felt like you'd chosen to go to this run down city but couldn't understand why suggests that maybe you're not as happy with you life as you could be. Maybe you blame youself because of a choice you've made and looking back don't get why you chose to do that because you've ended up somewhere you don't like.
However, the fact you were able to control the dream and go through a tunnel to this amazing place suggests that you feel you have the ability to change your life. You can make it better and although you might question things along the way (whilst traveling through your tunnel) things will turn out better in the end.
What I would say is that the ending has 2 possible meaning, the first is to take it as a warning, don't let friends drag you back into a life you hate.
The second meaning I could take from it is somehting different - although your life may seem to get better will you be lonely? If you have good friends then I'm sure you would always be willing to share something good with them and will always put them before something materialistic and beautiful. You're not afraid to loose something as long as you keep your friendship - a sign of a wonderful friend!
I really hope this helped. I'm not going to say it's completely accurate, it's just how I see things and obviously I'd have to know more about you to get a more accurate interpretation but on the limited information I have I hope this is useful!



