Here's some calorie info for TGIF:
http://www.thedailyplate.com/nutriti...od/tgi-fridays
You may be able to find something that won't hurt you caloriewise. If you feel it'll be too much of a struggle, however, then sure...definitely stay home. I've done it a few times myself.
But sometimes it's also good to get some "real world" experience and live a normal life, going out with your friends while still maintaining a healthy lifestyle...you know? This is something that is hopefully going to stick with you for the rest of your life. And at this point you may feel it's too much too soon, but eventually you'll get a handle of it.
Work your bum off not to eat the junk at your friend's house. You just have to stay focused on what is more important...reaching your goal, or that temporary mouthful of chocolate?
Drinking a lot of water helps me, I've found. My stomach feels much fuller, and it tends to curb my cravings.