In the same way that she doesn't mind giving you some space for yourself, she definitely won't mind when you're out with the boys. She loves you and understands that maintaining friendships is important. She knows you'd never stop her from hanging out with her friends, so she's happy to let you be social without her.
Let's be clear, though; you can't abuse her lenience on this one. If you're out with the boys every other night or you cancel plans with her in order to hang out with your buddies, things won't be looking so good for you. Your woman supports your friendships, but she still expects to be treated with respect. As long as you keep her informed of your plans, there shouldn't be any problems, just remember to not take advantage of her kindness.