<human>: Provide a brief overview of the text.

So I don't know how to explain this.

I met my girlfriend a year ago through a mutual friend, and we started dating right away. She moved in two weeks ago and I thought my life was completely beautiful. I love her so much it hurts to think what she is up to.

To be completely honest, I haven't noticed this until she moved in, but when I think about it, she actually was doing this way before she moved in, but I missed it because she was in my house a few times a month. 

So basically, it goes like this; out of nowhere, for example we are watching movies, she says she will go to market to get something to eat, like popcorn or chips, and she goes for sometimes 30 minutes, more or less. There are days where she does this twice, I wake up to her M.I.A, only for her to come home after I am awake. She tells me that she goes to running, sometimes market, sometimes to walk, but she doesn't look like she is coming from a run. Weird thing is, when she goes to market, she usually comes home without anything, saying like she forgot to buy and such. She also takes her phone with herself, which is unusual because she is someone who often leaves phone in house and can live without it.

I love this girl. She is my world. It hurts so much to think what she might be up to. I really don't know how to confront her. I asked her jokingly why she leaves house so much because she used to be a total introvert, spending whole week at home sometimes (as she told me), she said that she has changed, which I found weird.

Is following her to see what she is up to, a breach of trust? Please help me Reddit.
<bot>: Moved in with girlfriend recently, realized that she leaves house out of nowhere, everyday, sometimes twice, telling that she goes to market, to run, or to walk. But she comes home without buying anything. What do?