Friends while dating

Sooo I’m going to make a long post as short as possible. My bf and I have been dating for about three years now and we have been through a lot of things together. After like 6 months of us talking we kind of moved in together except, he moved in with me and my roommates. At the time he was working two jobs, but ended up quitting one (due to stress) so in the end I had to pay for just about everything because he had other bills that needed to be paid. Fast forward to today, we have an apartment together now and we allowed his really close friend to move in. Well, now the friend is going around and telling other people that I’m not a good girlfriend because I don’t let him go out or that I am always in their conversations, he doesn’t feel like he can talk to my bf, why am I driving his car so much, etc. Keep in mind that I use to stay in our room ALL of the time, the friend encouraged me, “come out talk to us blah blah blah”. Now when I do go up front, I don’t think I’m out of line and neither does my bf. Also of course sometimes I joke with my bf and say “stayyy homeee with me” but I ALWAYS tell him to go out and enjoy his friends, because if I want to go out with friends I don’t want him make me stay home. I wrecked my only car not too long ago and my insurance wouldn’t pay for the entire car, but I still have payments to make for the car sooo it would be kind of difficult trying to make two car payments at once and insurance, etc. My bf just told me all of things that someone told him that his friend has been saying and it’s sooo weird for me, I don’t want to get in the way of their friendship and I don’t want his friend to think that’s what I am doing. Any advice??