<human>: The good news is, the cancer isnt terminal. That doesn't mean the chemo doesnt take a toll on her mentally and physically.

Background: We had been friends for awhile and had gotten pretty close but when I started dating a different girl she backed off. ~1 year later I'm single and its take about a month until we're FWB. This was great, but I'm a senior in college, shes a junior, and I'm moving out of the state when I graduate for my job. I explained to her multiple times that we could not mix feelings into the relationship and that it would be better to slow things down or end it if separating feelings got difficult.
 
A few weeks ago she confessed her feelings for me and insisted that there was no good reason for us not to date. Maybe she was right but mostly Im just not confortable with dating and I know I'll feel trapped and unhappy (which now I kinda am anyway). I shouldve ended it there, but alas good ol' hindsight...

 Now things have escalted to the L word. She says she loves me and I dont say it back because I don't. But now shes being treated for cancer. To be clear its not the cancer or any changes in her that make me want out. I feel trapped and would rather be single, but Im not sure if I can break things off with her while shes fighting this.

Im feeling trapped, but really Im terrified that I am going to crush her spirit and hope. I need help.

Can you condense the text into three sentences or less?
<bot>: FWB has escalated to the L word from her, I want out, but she recently began a battle against cancer.