<human>: Can you succinctly summarize the text in 1-3 sentences?

So the other day I got off work and went to hang with a friend while she was hanging with her friend and she texts me telling me we need to talk. I get all worried because our relationship is great and I love her so much. Well it turns out she says she isn't happy. Now, her friend who she hung out with came into town from college, and now my girlfriend is getting these ideas about going to a different college to meet new people and find something new. She doesn't have many friends and spends most of her time with me which I am okay with. 

      
I lived with her and woke up to her every day and we love eachother. We talked yesterday about it and she says she just needs her space for now but I dont know what that means because I packed all of my stuff up and moved back in with my parents and she is still saying she needs time. About a week ago we were looking at apartments to move into together (we also looked months ago) and now she is saying she isn't happy? How can somebody go from making a commitment to get an apartment with their SO to breaking up with them a week later. Now this is totally random that she is doing this. Things have been good and we only bicker and fight on occasion but make up directly afterwards. It totally caught me off guard and I have been majorly depressed the last few days. Do you guys think she is going through a phase where she is confused about what she wants, or is it maybe just time to move on. We have never had a genuine break up like this before and I am very scared.
<bot>: girlfriend of 4 years randomly tells me she's not happy after we looked for apartments together under a week ago. Wants space/break.