<human>: Can you provide a brief rundown of the text in within 3 sentences?

My girlfriend of one year has been growing very distant since about a month ago. Not talking to me, hugs, ect. Whenever I try talking to her or try to understand what is going on she usually just gives the canned answer of "Nothing." I'm really confused as to why this is happening. Even our friends think it's weird that this is going on. I don't know if it's me or her at this point. I don't treat her wrong. I take her out on dates, even forgive her for cheating (she seemed sincere but I dunno. also just a forgiving person). 

We have had issues in the past such as all our fights or her cheating on me. I don't want to lose her but it just seems so hopeless at this point. Is there any reason for her to act like this? Any way to even salvage it? She's told me she doesn't want to break it off even though it seems like it.
<bot>: Girlfriend acting weird. Says it's because I've changed/don't love her anymore. Why is she acting like this? (willing to answer any questions asked if you need more info btw)