<human>: Give me the gist of the text in a nutshell

Reddit, you always have answers in my time of need, so here I am again. My ex and I had been together for about two years. We were very close, and she was and is my very best friend. Our personalities match better than I could imagine. Her family has also taken me in, and become my family in a way. She also has an almost 3 year-old daughter who I have been raising as my own. She broke up with me this past Friday.

She tells me that she needs some time to grow up on her own (we are fairly young, and have been living together since before we started dating. We have also essentially been together 24/7 since then. Not by choice, it's just the circumstances surrounding us). I completely understand, and I feel the same way, but I am still completely devastated. We have been living with her parents, and I unfortunately have nowhere else to go, so I am staying in their spare bedroom. Her family is just as upset as I m, since they love me very much. My girlfriend also still loves me, and I believe that very much, and says that she still wants us to be together when she is able to find her happiness on her own. She feels like she has been too reliant on me to make her happy, she wants to prove to herself that she can be happy independently. 

I think she is the girl I will propose to, so this is very difficult on me. She tells me she still wants us to be close, and try to work toward being together again. 

My question is this: How am I supposed to try and be just her friend for now? I need an idea of how to make this work so we can be together again. Kind of lost at the moment. And I will not give up, I genuinely think she is the person for me.
<bot>: Long time girlfriend broke up with me, but wants me to wait for her to find herself for a bit. How do I make this easier?