<human>: We've known each other for a long time, recently revealed crushes, and things got going fast. I never intended for things to get physical so quickly, but they have. However, she got distant and said she wasn't looking for a relationship. I was kind of crushed, but we agreed to stay friends.

Next hang out, we had an awesome day. At the end of it, she asks if we can kiss, I say yes, and it goes a lot further than that. We decide to become friends with benefits that night. We keep it up through the week, but I notice she's getting closer. During our last session, she stopped to just cuddle. It was nice, she asked if it was cool, I said sure because I actually really enjoyed it.

She explained to me that she had a lot of abruptly dead relationships. Guys that, for whatever reason, just ended things with her. She explains that as the reason she isn't quick to jump into one with me. I say I sympathize. We have a deep talk, we fool around a lot more, and she leaves as the sun is coming up. 

I haven't been asking for anything from this girl. Recently, she's been distant, not contacting me as much, not initiating plans. Tonight she said she wanted to cool it on the sex stuff and just hang out. I feel like I'm losing more and more ground. I really like this girl and would pretty much do anything she asked of me. 

She hasn't been cruel to me, but I think that I'm so invested, and that she is worth the investment, that it's gonna hurt real bad when she puts the axe to this thing. How can I explain myself without bringing *an end to it all, myself, and ending up being just like one of her past relationships? I really don't know what my best move is.

Provide a brief overview of the text.
<bot>: Things are serious with f.w.b but she keeps scaling the relationship back even further and it's starting to feel painful. What should my next move be?