Can someone please give me some real advice?

my girlfriend and i have been dating for three months. two months ago she had a relapse on drugs, and things started going down hill. we argued all the time due to her mood swings. she recently went through detox, and has been trying really hard to stay clean. she attends meetings on her days off, and just went to seek counseling for the first time. since she has been working hard on this, i have been there to support her in every way. she isn't the same anymore. she isn't as moody, but you hardly ever see her smile anymore. sometimes i feel it would be best for us to take a break, so that she can focus on herself. she says we are fine, but it feels like she is just saying that to ease my stress. i don't know where to go from here. i am confused, i just don't know..... real advice only please......