Would you do in this situation?

So I've been dating this woman about a month and a half now, and we really hit it off at the beginning. Talked and texted throughout the day, and spent time together when time permitted. We've introduced each other to our families and such. All was well I thought, until this past Friday when she started distancing herself from me and it's gotten to the point where she hasn't said I love you since Sunday night. And now it's one or two words or her not answering at all. I've asked her if everything is ok and she says we're fine. It sure doesn't feel like we're fine. It feels like I'm losing her. What would you do? Any thoughts?
Would you do in this situation?
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