<human>: Could you distill the essence of the text into 1-3 sentences?

After some pretty severe depression she got on medication and now says she feels like a whole new person and wants to experience all the things she feels like she's missed out on. We've been together for five years, engaged for most of that time and have a sort of floating wedding date.

The optimistic part of me that hopes this will all get worked out thinks maybe this is just cold feet and adjusting to her medicine. The rest of me is worried maybe she's just outgrown me. She tells me I'm the most important person in her life, I'm her best friend, and she loves me more than even her family, but she doesn't know if she's still in love with me. Sometimes she still expresses that she's in love with me, but she's just not sure all the time anymore.

We were friends for years before we even started dating, best friends for two years before, and I know I can't bear to see her with anyone else. I'm terrified of losing my best friend and the woman I was certain I would be spending the rest of my life with.

Is a break ever just a break? Or does a break up always follow?
<bot>: She wants to see other people and think about how she feels about me. If she decides she doesn't want to be together anymore I know I won't be able to have her in my life.